A site-wide pass cleaned up figures where labels sat on top of lines, curves, or each other — hundreds of diagrams across every course now place their labels clearly
Fixed an animation whose curve silently failed to draw, an arrow that never rendered, and several figures whose captions were clipped at the edge of their frame
August 27, 2026
Fixed the trig asymptote explorer, where the panel for choosing a function had gone missing entirely — thank you for the report
Competition Math has been fully rebuilt — all nine units, from contest strategy through olympiad topics to complete mock AMC, AIME and Putnam practice sets with worked solutions, now use the new interactive format
The mock tests now actually score themselves the way the real contests do — with a blank option that earns partial credit on AMC sets — and every test question has a full worked solution that provably matches its answer key
Competition Math Unit 8 — olympiad-level topics from group theory to advanced graph theory — has been rebuilt in the new interactive format
Corrected dozens of misstated theorems in those lessons, and every formula now carries the conditions under which it holds
Fixed five lessons where a typed answer like 50 was marked wrong unless entered as 050
August 25, 2026
Fixed text that ran together in one Algebra 1 lesson, and a total that was written two different ways in another — thank you for the reports
August 24, 2026
Fixed practice problems that failed to load in some Topology lessons — thank you for the reports
August 20, 2026
The first seven units of Competition Math — contest strategy, algebra, number theory, combinatorics, geometry, probability, and proof techniques — have been fully rebuilt in the new interactive format
Corrected competition facts and formulas throughout those units: scoring and guessing rules, misstated theorems, formula-sheet entries missing their conditions, and answer keys that marked right answers wrong
Starting a free trial now shows the exact date a first payment would land, and checkout says what happens next before you commit — no charge today, cancel in one click during the trial
Fixed reported issues in two Pre-Algebra lessons, and the Pre-Calculus reference sheet now prints cleanly
August 15, 2026
Fixed several user-reported issues in Pre-Algebra — thank you for the reports
The percent change calculator's chart now draws decreases downward from a zero line, so the picture always agrees with the direction of the change
The coordinate plotting lesson is now fully readable in dark mode, and its figure axes no longer fade into the background
The Discount Detective lesson now finishes at its actual last section instead of announcing completion early
The percent change calculator no longer garbles prices in its examples, and its wording is cleaner around negative changes
Clearer punctuation in the negative numbers summary where a dash could be mistaken for a minus sign
Fixed a geometry figure that drew a ray as a line segment, and moved angle labels clear of the lines they sat on
More video lessons are available
August 13, 2026
Resuming a membership now asks you to confirm first, and sends a confirmation email with your renewal date
Your profile now shows that a membership is set to end even after you reload the page, so the option to resume is always there
You now get an email if a payment does not go through, when a free trial becomes a paid membership, and when premium access ends
Fixed reported issues in fraction, geometry, and calculus lessons
Interactive explorer, simulator and solver activities now count toward course completion when you use them
August 12, 2026
After an animation finishes, its replay button now shrinks to a small circular icon so the content stays front and center
New SAT Math lesson on polygon angles — interior and exterior — including which formulas the test provides and which you need to know
New SAT Math lesson on reading intercepts in context: what a graph's starting value means and when it is safe to interpret
August 11, 2026
SAT Math Prep has been fully rebuilt — every lesson, example, practice set, activity and full-length test now uses the new interactive format
The full-length SAT practice tests now match the digital SAT: typed answers alongside multiple choice (negative answers included), a realistic topic mix, honest countdown timers, and a visibly harder second module
Fixed SAT practice questions with wrong answer keys, questions repeated between tests, and a few that could not be answered at all
The SAT score estimator now shows a score range and states its assumptions, and the study-plan links at the end of each assessment lead to real lessons
Probability has been fully rebuilt in the new format, with new lessons on the Poisson process and indicator variables and new practice for the negative binomial and hypergeometric distributions
Corrected probability formulas, figures and worked examples that disagreed with their own numbers
August 8, 2026
Canceling a membership now sends a confirmation email with your access end date
August 7, 2026
Fixed the Pascal's Triangle lesson in Combinatorics, where the bottom row of the triangle drifted out of line with the rows above it
August 5, 2026
Course progress on your dashboard and profile now reflects the lessons you had already finished — several courses, including Calculus 1, were showing no progress even after you had worked through them
The Premium free trial is now 14 days instead of 7, and starting it takes one less checkbox
The video lesson banner is slimmer and tidier, and lesson pages now end in a single bottom bar — the written version of a lesson is available from a small Text version control there
Summary sheets that made you scroll sideways to read a formula now fit everything on the page, matching the newer courses
Corrected worked solutions in several Trigonometry practice problems where the revealed answer disagreed with the answer key
Finishing a lesson, quiz, practice set, example or intro now marks it complete for you — the Mark Complete button still works, you just should not need it
Summary and formula sheets now fit on phone screens instead of clipping at the edge
A few lessons that were showing a neighboring lesson's video now show their own
August 4, 2026
Mental Math has been fully rebuilt — all 174 lessons, examples, practice sets, activities and reference sheets now use the new format
Fixed a speed drill that marked correct answers wrong: asked for 10% of 11, it expected 1 instead of 1.1
Fixed two timed activities where you could score higher by waiting than by answering quickly, and one where running out of time ended your whole session
Fixed questions that had no correct answer among the choices, and one that listed the same answer twice
The unit practice sets and the final test now cover what those units actually teach
Corrected the shortcut for squaring numbers ending in 5 — it was giving the wrong answer for anything longer than two digits
Corrected the complements-to-100 rule, which did not work for numbers ending in 0
Corrected the calendar lessons: the leap year rule, the century anchors, and several weekday labels that were wrong
Fixed formulas that were cut off on phones in the calendar activity, the quizzes and several reference sheets
Course completion achievements now show a progress bar, so you can see how far along each course you are
August 3, 2026
Fixed a Pre-Algebra place value lesson where the Continue button came back after you had already used it
Reset in that lesson now only resets the activity — it no longer takes back progress you already earned
Rolled that same fix out to interactive lessons across every course: a Continue you have already used stays used, and resetting an activity never takes back progress you earned
August 2, 2026
Added more video lessons to Calculus 1, Algebra 1, and Intro to Proofs
Sample videos on the Premium page now load right away — one click and they play
Fixed boxes in several Combinatorics lessons whose text was unreadable in dark mode
August 1, 2026
Fixed practice steps in the Algebra 2 division lab that gave away their own answers before you could try them
Fixed a lesson in Arithmetic where the Continue button could appear twice if you clicked before the animation finished
July 30, 2026
Premium members can now mark video lessons complete and earn XP, with progress shown for each course
Added more video lessons to Calculus 1 and Intro to Proofs
If you decide to cancel Premium, you can now optionally tell us why — one click, completely skippable, and it never slows the cancellation down
Clearer answer on the Premium page about how the video narration works, with the samples to hear for yourself
July 29, 2026
The navigation now shows a Premium tab that takes you to the Premium page — and if you are already a member, it shows a Videos tab that goes straight to your video lessons
The Premium page now says exactly which courses have video lessons, so you know precisely what is included before you decide
The Premium page now explains how the video narration works, with samples you can hear before deciding
Axiom Academy has graduated out of open beta — the beta banner is gone
The Premium button in the navigation is now easier to spot
Fixed many interactive activities across the site that could scroll forever and hide the Mark Complete button
July 28, 2026
Added a page that explains Axiom Premium properly, with sample lessons you can watch before deciding and answers to the questions people actually ask
Video lessons no longer start playing on their own when you open a course
Video lessons are now listed in curriculum order instead of being grouped by type, and each kind of lesson has its own colour
Fixed lessons on iPad where the page would jump back to the top and jitter while you were trying to scroll
Fixed a lesson in Times Tables that could not be finished — the Continue button never appeared
Moved the Limits at Infinity lesson ahead of the limits examples, so the examples no longer use a method before it has been taught
Fixed a line in One-Sided Limits where part of the sentence was missing
Corrected the What's Next notes at the end of many course units, which had been pointing at the wrong unit
Filled gaps where questions relied on material the course never taught — the lessons now teach it, or the questions now use what is taught
The Algebra 2 formula sheet now covers all ten units of the course
Corrected several test and practice questions whose answer keys were wrong or ambiguous
Rebuilt the ACT and GRE practice-test solution guides so every worked problem matches its actual test, with every answer re-checked
The GRE course now agrees with itself about the exam format throughout, and now teaches work-rate and defined-operation problems — two question types it previously tested without teaching
Reordered lessons in several courses so practice always comes after the ideas it uses
Rewrote a few practice questions that leaned on material taught later
July 27, 2026
Introducing Axiom Premium — optional companion video lessons with calm, guided walkthroughs, free to try for 7 days. Everything that has always been free stays free
A fresh new logo and refreshed look across the site
Rebuilt the opening units of Mental Math with clearer lessons and new animations
You can now attach a screenshot when reporting an issue from the contact page
Rebuilt the Fundamental Theorem of Calculus lesson in Calculus 1 with new animations that show accumulation becoming a function
Improved dark-mode readability across many lessons, and moved Finish buttons so they always sit at the true end of a lesson
July 21, 2026
Fixed sign-up and sign-in in dark mode — the text you typed was rendering nearly invisible, so your email and password looked blank as you entered them. Same fix applied to the contact form
Fixed lessons across many courses that went blank or stopped responding when you pressed Continue, so they can now be completed end to end
Corrected the Root Test lesson in Calculus 2 — it suggested reaching for the Ratio Test on a series where neither test can settle the question. It now points to the tests that do
Fixed a Set Theory quiz question that had no correct answer, and rewrote the hints across the Set Theory practice sets, which had been showing the same generic tips regardless of the question
Fixed the make-ten and doubles lessons in Arithmetic — the colours in the diagrams now match the colours in the key, and one walkthrough was replaying the animation for a different sum
Fixed the clock in the Number Theory intro, which started in the wrong place and disagreed with its own readout
Corrected arithmetic in several worked examples across Numerical Analysis, Statistics and Mathematical Modeling where a stated value did not match the calculation being shown
The dominoes in the induction lesson now fall toward each other and actually make contact, which is the whole point of the illustration
Fixed a Proofs activity that could grow until the page stopped scrolling
July 20, 2026
Every course is back in the catalog. We briefly unlisted a group of advanced and specialty courses while we brought them up to our current standards — you told us you missed them, so they are all listed again
Courses we have not yet rebuilt now say so up front, with a short note explaining what to expect. They are complete and free to use in the meantime
Every course is searchable again, including several that had never been added to search
Fixed a Trigonometry question that marked the right reference angle wrong, and an Algebra 2 problem whose answer did not match the question
Added the missing formula sheets to the Formula Sheets page — Arithmetic, Geometry, Linear Algebra, Abstract Algebra and several others were already written but had never been linked anywhere
Finished reordering lessons across the catalog — an earlier pass had left some units still grouped by type, so those courses now build concept by concept the way the rest do
Corrected module labels throughout the site — interactive tools and real-world applications were being shown as plain lessons, and several end-of-course tests were shown as practice sets
Fixed a Graph Theory practice question that marked the wrong answer correct and then explained why that answer was wrong
Fixed a Statistics example whose answer choices did not match its own worked solution, so the correct total was not among the options
Fixed a Statistics example that gave its own answers away — several steps labelled each choice with whether it was right, so you could pick correctly without doing the statistics
Fixed a Pre-Calculus quiz question that asked you to read a point off a graph that had no scale on it — the graph now has a labelled grid
Replaced placeholder explanations that were showing an unrelated note about linear algebra after correct answers in Topology, Set Theory, Optimization, Fourier Analysis and Numerical Analysis. Full worked explanations for these come with each course rebuild
Rewrote the solutions in a Set Theory example where every problem showed the same answer, and none of them addressed the problem asked
Fixed lessons you could get permanently stuck in — Set Fundamentals and Organizing Collections in Discrete Math, and the Subtraction Principle in Combinatorics all had a Continue button that could never appear
Set Fundamentals in Discrete Math now has real animations. It had been shipping with placeholder graphics that showed the same single line of text on every step
Fixed a Combinatorics lesson that skipped two of its five slides entirely, so you never saw them
The Venn diagram in Organizing Collections now fills in when you click a region, and picking a wrong answer lets you try again instead of ending the lesson
Fixed a Differential Geometry sphere that vanished when you zoomed in past a certain point, and made its diagrams draggable on touchscreens
Animations that fail now let you continue anyway, so a broken graphic can no longer trap you in a lesson
Fixed the Dimensional Analysis lesson in Mathematical Modeling, which went blank the moment you pressed Continue
The Rotating Wheel lesson in Trigonometry now finishes properly and hands you on to the next lesson, instead of telling you to continue with nowhere to go
Fixed the password counting lesson, where getting a question wrong removed the guidance and left no visible way forward
July 17, 2026
Reordered the lessons in many courses so each idea now comes after the material it builds on — you will no longer reach an example, practice set, or advanced topic before the lesson that teaches it
Added new lessons to fill gaps students kept running into — the Mean Value Theorem and properties of the definite integral in Calculus 1, equations of planes in Calculus 3, quadratic functions and completing the square in Pre-Calculus, factoring trinomials in Algebra 1, and the Pythagorean theorem, laws of exponents, and cofunction identities in the foundational courses — each paired with a worked example
Started rebuilding Algebra 2 on our refreshed design, beginning with its opening units — cleaner layouts, sharper concept animations, and full dark mode
Fixed a few duplicated lessons that could send the Next and Previous buttons to the wrong place
Temporarily unlisted a group of advanced and specialty courses while we bring them up to our current standards. Nothing is gone — each will return to the catalog once we have finished updating and polishing it
July 10, 2026
Repaired the interactive activities in Intro to Proofs so their checks and worked steps are now mathematically correct
Fixed vectors, arrows, and angles that could point slightly the wrong way in several Pre-Calculus, Complex Analysis, and Linear Algebra (Matrices) activities
July 9, 2026
Every course page now shows a Recommended preparation note suggesting which courses to take first, with quick links to each — so you always know where to start
Refreshed much of the Calculus 3 course on our cleaner design, with sharper concept animations and full dark mode
Fixed text that could get cut off on phones in many course summaries and reference sheets
Fixed an overlapping label on the Calculus 2 area-between-curves lesson so the running area no longer sits on top of the graph
June 30, 2026
Rolled out our refreshed design across many more courses — Pre-Calculus, Calculus 1, Calculus 2, Algebra 1, Geometry, Calculus Readiness, and Complex Analysis now share the same clean look, sharper concept animations, and full dark mode we brought to Real Analysis
Rebuilt the Linear Algebra course on the refreshed design and renamed it Linear Algebra (Matrices) so it is easier to find in the catalog
Reordered the Intro to Proofs course so each concept builds on the ones before it — no example or practice set now shows up before the lesson that teaches it
June 26, 2026
Rebuilt the entire Real Analysis course on our refreshed design — lessons, worked examples, interactive activities, practice sets, summaries, and reference sheets now share one clean look with sharper concept animations and full dark-mode support
Fixed answer keys and repaired broken examples across Real Analysis quizzes and practice sets, so the questions and their feedback are now mathematically correct
June 17, 2026
Refreshed our Terms of Service and Privacy Policy — clearer plain-language wording, an up-to-date description of the limited data we collect, and a cookie banner that now fully respects your choice when you decline
June 14, 2026
Gave the Arithmetic course a full visual refresh — every lesson, example, practice set, and quiz now shares one clean, consistent design with smoother animations and a unified color scheme
Sharpened the animations across Arithmetic so each one clearly illustrates the idea it teaches, in both light and dark mode
June 12, 2026
Deep-audited the entire Arithmetic course — restored missing picture objects (apples, stars, cookies) that had vanished from counting lessons, repaired lessons that went blank when clicking Continue, fixed a practice module where wrong answers froze the quiz, and corrected answer layouts in two quizzes
The What is Addition lesson's Learn / Try It / Stories / Practice tabs now show their content right away
Eleven courses are back in the catalog: Statistics, Graph Theory, Game Theory, Algebraic Topology, Numerical Analysis, Mathematical Modeling, Partial Differential Equations, Optimization, Fourier Analysis, Proof-Based Linear Algebra, and GRE Quantitative — the library now spans 47 courses
On phones, lessons now open with the content front and center — the course menu starts tucked away and slides in from the ☰ button instead of covering the page
Your browser tab now shows the actual lesson name instead of a generic title, so bookmarks and history are finally useful
Fixed color highlighting in worked examples across many courses — highlighted terms no longer bleed their color into the rest of the expression
Reordered the Set Theory course so practice modules come after the lessons they draw on
June 11, 2026
Timers are now optional on every timed quiz, challenge, and practice test — a new ⏱ toggle lets you switch the countdown off (or back on) anytime, and the site remembers your choice
In timed challenges, the clock now pauses while you read the solution between questions, so reviewing explanations no longer costs you time
Fixed answer buttons that did nothing on several practice modules across the advanced courses
Fixed a step in the products of sines and cosines walkthrough that highlighted too much of the expression
Repaired quiz timers that silently never started on several quizzes
The Topology course is live — point-set topology and an introduction to algebraic topology, now in the Advanced Mathematics section
Polished the formula sheets page — the browse section and the closing call-to-action now match the rest of the site
The About page now leads with what Axiom is and how it works, with the instructor behind it introduced alongside
Visiting your profile while signed out now shows a friendly sign-in invitation instead of a blank page
Corrected the course count on the placement quiz page
In step-by-step examples, every wrong answer you try now stays dimmed so you can see what you have eliminated — previously only your latest pick was dimmed
Removed redundant Continue buttons from several real-world lessons where the action button already moves you forward, and fixed lessons that could silently dead-end partway through
Fixed play buttons that did nothing on several lessons, including the probability generating functions lesson where it blocked finishing
Corrected the dot product walkthrough — 2 + 15 + 8 is 25
Fixed the velocity line in the rocket work example so it starts at zero like the readout says
June 10, 2026
Fixed dark-mode readability across several lessons — the trig integral laboratory, decomposition strategies animations, and the minimal spanning sets explorer (which had a half-black coordinate plane) are all clearly readable now
Fixed the y-axes in the Riemann sums animations so they sit at the plot edge and reach above the curve
Fixed a probability lesson where the second animation would not play, which blocked finishing the lesson
Corrected a determinants quiz answer (the determinant is 15, not 9)
Fixed an inequalities lesson whose animations skipped instantly instead of playing, and removed a dead Continue button from the function machine activity
Reordered Calculus 2 Unit 1 so worked examples, activities, and practice sets follow the lessons they belong to instead of being grouped at the end
Fixed the reference triangle in the trig-substitution example — the side label no longer cuts off and the angle arc now curves the right way
Fixed dark-mode animations across a large portion of the library — lessons whose diagrams showed dark, unreadable text on a black background now display crisp light text on the dark theme
June 9, 2026
Fixed a range of interactive activities across Algebra, Trigonometry, and Abstract Algebra that opened to a placeholder animation instead of their actual tool — the calculator, grapher, or explorer now loads right away
Fixed clipped "Remember" labels on the trig-substitution reference cards
Fixed unreadable dark-mode text in a probability convergence lesson
Corrected a multivariable calculus practice question that was missing its correct answer
Fixed wide equations that ran off the right edge on phones in an algebra lesson
Fixed reference and formula-sheet pages that could load blank in Safari until you scrolled — they now paint right away
Moved the feedback button to the bottom-right on lesson and course pages so it no longer covers content
Reordered the courses page to lead with Foundations and Calculus before Test Prep
Softened the placement-quiz button outline so it reads cleanly on the page header
The home page demos now follow dark mode, the lesson demo plays its animation on its own, and there are new Examples and Practice demos to try
Fixed a determinants practice set where the answer buttons did not respond
Removed irrelevant animations that were appearing in the cryptography application lesson
Fixed lessons that were showing an unrelated calculus animation — the animation engine now matches each lesson to its actual topic
June 7, 2026
Fixed the compass-and-straightedge animation for constructing a perpendicular bisector so it now shows the two circles being drawn
Fixed a statistics lesson where a confidence-interval formula appeared as raw code instead of formatted math
Fixed the Ring or Not? activity so you can select a structure to test, and removed an unrelated animation
Restored the countable pictures in an addition practice quiz
Corrected a unit-rate question whose answer choices left out the correct answer
June 6, 2026
On practice problems, the Reveal Solution button now keeps up with you — once you solve a problem on your own, it points to the next one instead of staying stuck on the first
June 4, 2026
Fixed a set theory animation that highlighted the wrong number when showing why two sets are unequal — it now circles just the extra element
Corrected the arrow directions and lined up the formula steps in the secant and tangent integrals lesson
Centered the labels inside the Gamma distribution animation so the text stays neatly within its box
Replaced the unrelated animations in the traffic-network lesson with real flow-network visuals — intersections, conservation of flow, and the system of equations it creates
Polished animations and visuals across the business calculus and multivariable calculus lessons
Fixed practice questions where clicking an answer choice did nothing
Pages that flickered or briefly went blank while loading in Safari now load cleanly across the whole library
Fixed more dark-mode spots — cards, callout boxes, difficulty badges, and activity panels that had stayed bright white now follow your theme
Removed the score and progress bar from the top of practice assignments for a cleaner layout
Rebuilt the animations in the proofs and logic lessons to be clearer and more interactive, and the play buttons now clearly read Play animation
Fixed math that was showing as raw code instead of formatted symbols on some pages
Fixed several interactive activities — the logic bridge-builder now lets you move pieces and start over, a coverage puzzle no longer needs extra clicks, and a proof-technique matching exercise classifies and shuffles its options correctly
In step-by-step examples, a stray extra continue button no longer lingers after a correct answer
June 2, 2026
Fixed math that was hard to read in dark mode — square roots and other radical expressions no longer show up as a black box, and formulas inside highlighted panels stay legible
Moved the feedback button inside lessons so it no longer overlaps the Next button
Reordered the modules in many courses so every unit flows in a consistent order — introductions first, then lessons, examples, and practice, with the summary, reference, and unit assessment at the end
Formula sheets and reference pages now appear fully on first load instead of flickering, showing only part of the page, or staying blank until you scrolled
Cleared decorative emoji out of the lessons for a cleaner, more focused look, and standardized the lesson-type labels in every course sidebar so each module is tagged consistently
Moved the Continue button to the bottom of each lesson step so it no longer sits in the middle of the content
Temporarily set a few advanced courses aside while we bring them up to the same quality bar as the rest of the library — they will return once they are polished
In quizzes and practice sets where the correct choice tended to land in the same position, the answer options are now shuffled so the right answer no longer clusters in one spot
The Early Bird and Night Owl achievements now track properly — completing lessons before 7am or after 11pm in your local time counts toward earning them
In the polar-curves lesson, the slope at a vertical tangent now reads "undefined" instead of a very large number
The parametric-curves animations now draw the moving point, its path, and the velocity arrow instead of appearing blank, and the tangent line now actually touches the curve
Made the text inside the colored result boxes in the parametric-derivatives lesson readable instead of blending into the box behind it
The exponential growth and decay graph now curves like a true exponential, and its title switches between population growth and radioactive decay depending on the sign of the constant
The Disk Method practice now walks through the worked solution for a sine-squared volume integral, where substitution alone gets stuck
Removed a leftover animation and Continue button that lingered at the bottom of many step-by-step lessons
Worked-example lessons across the platform no longer show a step's answer before you are asked — each multiple-choice answer now fills in its own step, so the example builds up from your choices
Fixed lessons that could go blank when you pressed Continue on the last step, so the page keeps your place instead of clearing
The global rank on your achievements page now reads as a clear "top percent" standing
An achievement progress bar that could read lower than a badge you had already earned now stays consistent
Set Theory lessons: corrected an interval bar that stopped one mark short, a set label that was cut off, hard-to-read section headers, and a diagram that appeared twice
Calculus 2: a card-matching exercise that wrongly reported everything matched now works and shuffles its options, the u-substitution arrows point the right way, and an information panel no longer covers the angle slider
Calculus 1: redrew the disk-method cross-section, repositioned the arc-length labels and darkened their boxes for dark mode, and improved the wheelchair-ramp real-world example
Arithmetic: corrected the Array Builder row and column labels, the "What is Multiplication?" animation, and the order of the times-tables lessons
May 31, 2026
Cleaned up the remaining dark-mode contrast spots — course pages now darken their unit lists and dropdown bars, the profile avatar initials and the rank and XP text on the achievements page no longer fade into their background, and formula boxes and quiz answer choices that had stayed white now follow your theme
Redrew the animations in the Calculus 1 Area Between Curves, Net Change Theorem, Average Value, and Volume by Cross-Sections lessons so the shaded regions reach their boundaries, the curves meet where the labels say, and the formula symbols no longer sit on top of the graph
Removed duplicate lessons that appeared back-to-back in the Calculus 1 applications-of-integration unit
Fixed a Continue button that sat off to the side and did not respond on some Calculus 1 lessons, so you can move on from those modules again
The search shortcut hint now shows Ctrl+K alongside ⌘K, so the keyboard shortcut is clear on Windows as well as Mac
Fixed a couple of achievement badges that were not unlocking even after their requirements had been met
May 29, 2026
Dark mode now carries all the way into the lessons — module content, quizzes, and formula sheets follow your theme instead of staying bright white, and a new button in the lesson header lets you switch between light and dark without leaving the page
The course catalog and browse pages now darken properly in dark mode, with higher-contrast text so it is easier to see where you are
Math that used to show as plain typed-out text now renders as properly typeset notation across a range of Calculus, Linear Algebra, and ACT, GRE, and SAT prep modules
Quizzes now have a Previous button so you can step back to review or change an earlier answer
Course sidebar units expand and collapse with a smooth animation, and the redundant in-lesson "Continue to Next Lesson" button has been removed since the course navigation already handles moving on
Achievement badges now credit activity you completed earlier, so progress you had already made counts toward what you have unlocked
Updated the ACT vs SAT comparison for the new digital SAT, and reworked the interactive course demos on the homepage
Fixed visual issues in the Calculus 1 solids-of-revolution modules and corrected several lesson and quiz content problems, including a practice question that listed the same answer twice and a formula that mislabeled its system size
May 27, 2026
Site-wide arrowhead alignment — re-anchored animation arrowheads across 76 modules so they actually point at their lines instead of sitting slightly offset (follow-up to the platform-wide arrowhead-resize work from yesterday)
Fixed several modules in the integration unit of Calculus 1 — the Module 127 catalog title now reads "Fundamental Theorem of Calculus - Part 1" (instead of just "Module 127"), the Practice: Definite Integral Properties quiz uses proper f(x) dx notation throughout, the Intro to Reversing the Derivative module is properly centered, and the U-Substitution arrowheads are aligned
New honor-badge system for the most engaged contributors — every signed-in user during open beta now sees an Open Beta Tester badge on their /achievements page, with Bug Hunter, Feature Architect, and one-of-one badges granted for distinct contributions to reporters whose bugs and feature suggestions have shaped the platform
Modules that used to fire native browser popup alerts (validation errors, "please enter a value" etc.) now show a non-blocking inline toast instead — same messages, but they don't lock up the page
Fixed an AMC algebra practice quiz where Question 5 marked the correct count as 6 (the actual answer is 8 — divisor pairs of 21 include negatives too)
May 26, 2026
Quiz-based modules across the entire platform now declare a light color scheme so multiple-choice option text stays readable when a visitor's OS is in dark mode (previously some labels rendered white-on-white)
Several fixes from the weekend's autonomous QA pass — including hero-badge colors on prealg modules, a Transformations Test question with two value-equivalent answers, and several geometry visualizations where points sat off the curve they were meant to label
May 25, 2026
Flushed the weekend QA backlog — 15 user-reported bugs shipped across Calculus 1 Unit 4 and Pre-Algebra, plus catalog cleanup of duplicate modules in Calc 1 Unit 4
Fixed the Identifying Optima practice quiz where the Q1 graph and answer explanation contradicted each other (the points have been redrawn so Point A is the global minimum the answer key describes)
Fixed the Convergent vs Divergent improper integrals lesson where the third animation's play button did nothing
Fixed the Place Value Mastery module continue button (was unwired)
Reordered the Extrema Classification practice in Calculus 1 Unit 4 so it appears after the Second Derivative Test lesson it depends on
May 22, 2026
Fixed the Conditional Probability Quiz — one question was scored with the wrong answer, and another listed two answer choices that were really the same value
Fixed the Product Rule Example, which marked a correctly factored answer wrong because the terms were written in a different order
Fixed the Implicit Curve Explorer so the circle shown matches the equation beside it
Fixed the chain rule formula spilling outside its card on the Rules of Differentiation summary, and clarified an ambiguous exponent in a Rules of Differentiation quiz question
Fixed an animation on the Logarithmic Differentiation lesson where an arrowhead was separated from its line
May 20, 2026
Quiz and practice answer choices now appear in a randomized order — previously the correct answer often stayed in the same position from question to question, which made some quizzes guessable
Reviewed and corrected math and content issues across the Pre-Algebra units — equations and inequalities, ratios and proportions, and linear relationships
Fixed the implicit differentiation lesson where the tangent lines drawn on a circle pointed the wrong way, and fixed the achievements leaderboard showing one extra name
May 18, 2026
Quiz options can now be selected by clicking anywhere on the answer, not just the small radio button
Added a download button to the formula sheet pages
Fixed unreadable dark text inside the colored event boxes on a Probability lesson, and corrected wrong answer keys on several Pre-Algebra equation problems
May 15, 2026
Corrected a wrong answer key on the Matrix Multiplication practice
Fixed the Derivative Builder and Graphical Derivative Sketcher activities, where part of the graph was missing
Fixed answer options that could not be selected on the Product Rule practice activity
Removed a duplicate lesson that appeared twice in Calculus 1 Unit 3
May 13, 2026
Fixed broken lesson navigation buttons across Linear Algebra for Machine Learning Unit 2
Fixed formulas extending past their boxes and removed stray empty boxes on the Vector Norms lesson
Corrected the worked-example arithmetic on the Linear Combinations lesson
Fixed a quiz where changing a wrong answer to the right one briefly flashed the green box in red
May 12, 2026
Fixed incorrect graphs and a mismatched analogy on the "When Derivatives Don't Exist" lesson
Fixed tangent lines that crossed through the curve instead of touching it on the Continuity vs Differentiability lesson
Polished the layout and animations on the L'Hôpital's Rule lesson
Fixed practice modules that skipped ahead before you could finish reading each step
May 9, 2026
Shipped a wide batch of fixes across Pre-Algebra, Probability, and Linear Algebra lessons
Fixed a blank drawing canvas that stopped a Real Analysis lesson from continuing
Fixed a coin-flip demo that always landed on heads regardless of the stated outcome
Fixed a speedometer activity where the dial and the speed reading fell out of sync
Fixed the site styling occasionally failing to load on a hard page refresh
May 6, 2026
Fixed white-on-white question text on the Matrix Multiplication and Matrix Arithmetic practice sets
Fixed quizzes where the "Next" button stayed disabled or needed a page reload to continue
Corrected wrong answers on the Real Analysis Series Test and a NumPy practice problem
Fixed practice sets that always placed the correct answer in the first slot
May 2, 2026
Fixed unresponsive answer buttons on the Cauchy Sequence practice set
Fixed text that became invisible after the animation on the Separation of Variables lesson
Fixed invisible math on the homepage practice widget
April 30, 2026
Shipped a large batch of fixes across the Calculus 1 antiderivatives, related rates, curve sketching, and optimization lessons
Fixed broken math rendering on the Symmetric Polynomials lesson
Fixed the bug-report widget so reports are tagged with the page they were sent from
April 27, 2026
Corrected the Math for CS Venn Diagram Activity, where the shading was wrong on most of the challenges
Added a self-service option to delete your account from your profile page
Fixed misaligned arrows on mapping-diagram questions and broken equation rendering on the Vieta's Formulas lesson
April 24, 2026
Fixed animations on several Geometry and Complex Analysis lessons that showed a generic shape instead of the lesson's own diagram
Fixed a blank interactive that prevented a Differential Geometry lesson from advancing
Fixed broken "Continue" buttons on a Topology lesson and the Function Transformer Lab
Fixed math text that was not displaying on the Real Analysis course pages
April 19, 2026
Ran a full math check across every course on the site (all 47 courses, 8,305 modules, 15,130 quiz questions, 76,061 KaTeX expressions) — zero LaTeX syntax errors and zero wrong-answer mismatches detected by the SymPy verifier. Three quizzes (Algebraic Topology: Exact Sequences, PDEs: First-Order, Set Theory: Models and Consistency) still had answers clustered in one letter position even after yesterday's shuffle; re-shuffled them with a balanced assignment so correct answers are now spread evenly across A/B/C/D, and cleaned up one solution on the PDE quiz that still referenced "Option 2/3/4" by number
Fixed emoji rendering across the entire site — on devices without a default emoji font (some Linux, older Android, some Windows installs), the 📜 🏛️ ⚔️ 💡 icons in module headers were showing as blank boxes or question marks, which looked like broken content. Every module (8,438 files) now has explicit emoji-font fallback, so those icons render correctly on every platform
Fixed a wrong answer on the Calc 2 Section 3 Assessment geometric-series question — the stored correct answer was 5/3 (the expected sum is 5/2); both the answer key and the worked solution have been corrected
Rewrote a Calc 2 Section 3 Assessment question that depended on the answer options staying in the letter order "A/B/C/D" — after yesterday's MCQ randomizer, the solution text referenced "B and C" but those letters no longer pointed to the same options users saw; the question and solution now reference the formulas directly instead of letters
Fixed the rate-of-change animation on the Differential Equations "Language of Change" lesson — the tangent line was drawn with a steeper slope than the curve, so it visibly crossed through the graph instead of touching it; the slope now matches the curve's derivative at the tangent point
Fixed mobile overflow on the Calc 2 "Power-Reduction Arsenal" lesson — product-to-sum formulas were being cut off on the right side on iPhone; formula cards now shrink to fit the screen and long equations can scroll horizontally if needed
Fixed the frog position on the Arithmetic Number Line Explorer — on wider-than-viewport number lines the frog was sitting a few numbers to the left of the highlighted tick; frog now anchors to the actual tick element instead of a rough percentage
Removed the duplicate "Defining Continuity – A Calculus Foundation" lesson from the Calculus 1 course — it was byte-for-byte identical to the "Defining Continuity" lesson immediately before it; users were seeing the same lesson twice in a row
Fixed the tab switcher on the Arithmetic "Skip Counting by 2s, 5s, 10s" lesson — switching between the three tabs silently failed on Firefox and Safari because it relied on a Chrome-only global event; tabs now work across all browsers
Improved the "Check your email" screen after sign-up — added a working "Resend verification email" form (the old page just said "try signing up again," which would usually error with "user already registered"), plus a nudge to check spam folders
April 18, 2026
Fixed the slider on the Algebra 1 "Language of Algebra" lesson — on mobile the slider was being squeezed to 4 pixels wide and was unusable; now stacks vertically with the full width available
Fixed a broken direction field graph on the DE Direction Field Laboratory — a block of CSS had accidentally been pasted inside the JavaScript, breaking the entire script and preventing any canvas from drawing
Fixed the Calculus 1 L'Hôpital's Rule Calculator — the quiz options were never populating, so users had "no way to complete it"; startup order race fixed
Fixed the Matrix Notation practice quiz — clicking a dimension option was silently failing on every question due to a conflicting handler; now registers properly and shows the correct/incorrect feedback
Fixed the Calc 2 "Spinning Into Solids" intro — shape cards were not clickable; added the missing interactivity layer so users can select shapes and advance
Fixed the Calc 1 "Racing to Zero" input-output table — rows were being populated but staying invisible because of a missing CSS animation keyframe; table now visibly fills in
Fixed the De Morgan answer button on the quantifier-negation game — defensive CSS so clicks always register on the option card, not on a child element
Fixed mislabeled third practice question on the DE "Matching Fields to Equations" module — it was titled "Damped Oscillation Field" but was really exponential decay
Improved animation selection on Differential Equations modules so "Applications" and "Key Insights" sections in cooling-themed lessons now show a cooling animation instead of damped oscillation
Introductory / summary DE modules now fall back to a slope field animation instead of damped oscillation when the section heading is generic
Real-world-example modules in the proof course now rotate through visually distinct animations per step instead of showing the same proof-derivation animation repeatedly
Precalc vertical-line-test lessons now show different animations across their steps rather than the same graph three times
Mobile fix: on modules with wide interactive canvases, the canvas container now allows horizontal scroll instead of clipping to half the diagram
Content fix: Calc 2 "Area Between Curves" practice Q2 now accepts the correct answer of 64/3
Content fix: Calc 1 "Repeated L'Hôpital's Rule" example walkthrough now matches the stated answer
Content fix: Set Theory quiz Q9 now correctly accepts the equivalence-relation answer
Content fix: Crypto history module no longer says we factor "huge prime numbers" (just "huge numbers")
Content fix: Calc 2 Section 1 Assessment no longer telegraphs "trick question" in one of the answer options
Content fix: Algebra 1 "Properties in Practice" associative-law animation now shows both numbers inside the parentheses
Upgraded email delivery infrastructure to a paid plan — confirmation and password-reset emails now have headroom for growing signup volume
Bug reports can now include a screenshot — a new "attach screenshot" option appears on the feedback form
Moved the feedback button so it no longer overlaps the Next button on mobile, and dimmed it slightly so it doesn't compete with module content
April 17, 2026
Rewrote 13 GRE Quant Data Analysis modules — previously placeholder scaffolding, now full content covering data interpretation sets, histograms, error analysis, 12-question quiz, practice sets, worked-solution walkthroughs, a formula reference sheet, and real-world applications
Temporarily hid Competition Math course from the catalog while content is being built out — direct links still work but now show an "Under Construction" banner
Fixed a corrupted Calculus 3 surface integral module — removed orphan JavaScript that had leaked into the end of the file
Added support@theaxiomacademy.org as a working contact address (replaces old contact form in the legal pages)
April 16, 2026
Fixed wrong answer keys on several SAT Heart of Algebra assessments and practice sets across Easy, Medium, and Hard tiers — answers now match the math
Quiz timers are now optional — turn the timer on or off with a toggle at the top of any quiz or assessment
Fixed readability across thousands of definition boxes, example cards, summary panels, and info callouts that were showing invisible white-on-white text
Improved math rendering resilience — a single typo in one equation no longer breaks the rest of the page's math on any module
Fixed missing math symbols on a vector calculus module (AP Calc 9.9) where only the first instance of derivative notation was rendering
Fixed missing symbols on the Algebra 1 functions reference sheet, a Calc 3 formula compendium, and a rational root theorem practice module
Fixed broken coin flip interaction on the probability independence module
Fixed button color bugs on number theory, cryptography, and proof-based modules
Fixed currency formatting that was bleeding into math rendering on real-world problems across probability, pre-algebra, algebra, and business calculus modules
Fixed math rendering in Algebra 1 formula sheets, step-by-step example walkthroughs, and graphing modules
Fixed badge colors on Algebra 1 activity, summary, and real-world modules
April 9, 2026
Added dedicated animations for well-ordering, invariants, and infinite descent in the Intro to Proofs Advanced Methods unit
Fixed broken step-by-step navigation in modules across Calculus 2, Calculus 3, Differential Equations, Discrete Math, Combinatorics, Optimization, PDE, Proofs, Statistics, Trigonometry, and Matrices
Fixed excess blank space below module content on tall screens
Fixed white-on-white text in a Proof Committee Selection practice module
Fixed badge color on the Advanced Methods Summary module
April 8, 2026
Rewrote ACT Math Prep modules — geometry, trigonometry, practice tests, and score estimator now have real content instead of placeholders
Rewrote GRE Math Subject Test modules — abstract algebra, real analysis, topology, differential equations, and full practice tests with graduate-level content
Rewrote Math for CS modules — logic, set theory, combinatorics, probability, graph theory, and complexity theory now fully built out
Expanded GRE calculus review modules with complete formulas and worked examples
April 7, 2026
Replaced placeholder content in Proof-Based Geometry lessons with real mathematical content — every lesson now teaches actual material
Removed broken "Mark Complete & Continue" buttons across the site
Fixed white-on-white text readability issue in Differential Geometry practice modules
Fixed osculating circle positioning and tangent vector placement in curvature animations
April 6, 2026
Fixed broken quizzes on GRE Strategy Knowledge Check and GRE Mixed Question Types — questions now render and accept answers properly
Fixed quiz solutions across many modules that were showing code or gibberish instead of real explanations
Practice quizzes now show a "Next Question" button instead of auto-advancing — you can read explanations at your own pace
Fixed "Continue to Next Module" button in Competition Math modules — no longer leads to a 404 page
Fixed continue button on Number Theory divisibility patterns module
Improved grouping box animations in divisibility and division algorithm lessons
Fixed misnumbered quiz steps in division algorithm example
Moved feedback button so it no longer overlaps the bottom navigation bar
Added concrete examples of common proof-by-cases categories (even/odd, positive/negative, remainder classes)
April 5, 2026
Fixed animation engine overwriting custom animations across many modules — topology, Simpson's Rule, DE Systems, and others now play their intended animations instead of generic defaults
Fixed formula sheet modules returning 404 across courses
Sidebar now defaults to collapsed so module content gets full screen width
Fixed DE Systems Summary — now shows topic-specific animations instead of generic vector addition
Reviewed and polished Differential Equations modules in the early units — improved animations, interactives, and content quality
Fixed gray bars in module viewer — seamless white background throughout
Fixed tangent line animation rendering incorrectly in numerical methods modules
Fixed Summary badge color from gray to proper dark blue across summary modules
Polished Differential Equations later units (Laplace Transforms, Series Solutions, Numerical Methods)
April 4, 2026
Fixed differential geometry animations — points and vectors now mathematically computed to lie exactly on curves with correct tangent directions
Rewrote Calculus 1 comprehensive quiz from scratch — was not loading
Fixed DE practice quiz — questions now properly reveal after answering the previous one
Fixed statistics quiz accepting equivalent expressions (sqrt(8) = 2sqrt(2)) and clarified population vs sample standard deviation
Fixed matrices quiz — corrected wrong answers on Cramer's Rule and inverse method questions
Comment deletion now saves properly
Reordered courses for better topic flow — lessons, examples, and practice problems now grouped by topic instead of by type
Fixed password reset flow — emails now work end-to-end with branded template
Upgraded all auth emails with Axiom Academy branding
Added What's New page
April 3, 2026
XP, achievements, and streaks now sync to your account — progress persists across devices when logged in
Improved Simpson's Rule animation with clearer smooth curve visualization
Fixed module step progression — questions now properly advance through each step instead of skipping to next module
Fixed quiz sequencing — solving a question now reveals the next one automatically
Fixed challenge button text becoming unreadable on click
Fixed interactive canvas click offset on slope field and other interactive modules
Fixed achievement popup blocking navigation — moved to top of screen with dismiss button
Improved animations for Differential Equations and Proof courses
Fixed tangent line direction in DE course animations
Fixed incorrect answer choices on Algebra 1 final exam Q18
Reordered Intro to Proofs course for better pedagogical flow
Removed placeholder animations from Foundations Summary
Fixed Truth Table Builder activity — now fully interactive
April 2, 2026
Fixed login/authentication — sign in now works reliably across all browsers
Fixed 404 errors on certain course modules
Comments now persist across devices and sessions
Fixed sidebar click targets in module viewer
Fixed Next Module button reliability
April 1, 2026
Launched The Axiom Academy — free interactive math modules spanning the full curriculum from pre-algebra through graduate topics
Added feedback widget for bug reports and feature suggestions