AP Calculus AB — AP Central
Best for: the course framework itself. The CED, exam format and teacher resources straight from the source.
Verified live 8 Oct 2026
Resource library
Curated. Kept current.
Free and paid calculus resources — free first, and anything paid is labelled. Every link here was checked live on the date shown; dead ones are weeded out rather than left to rot.
The first thirty
AP Calculus BC — AP Central
Best for: BC-specific framework and exam format — the parallel page to the AB one above.
Verified live 8 Oct 2026
AP Exams Calculator Policy — AP Central
Best for: the definitive answer on calculators, including where the built-in Desmos tool is available on the calculus exams.
Verified live 8 Oct 2026
AP Exam Dates — AP Central
Best for: the exam calendar and start-time changes — check this before you print a schedule.
Verified live 8 Oct 2026
AP Calculus AB — AP Students
Best for: handing to students. Exam-day logistics, dates and what to expect, written for them rather than for teachers.
Verified live 8 Oct 2026
Desmos — Graphing Calculator
Best for: the calculator your students will actually use — the same tool, in the same family, as the built-in one on the exam.
Verified live 8 Oct 2026
GeoGebra — Calculator Suite
Best for: the geometry-and-algebra view Desmos does not give you — useful for building visual intuition before the symbols. GeoGebra’s licence page says it is free of charge for non-commercial users, which covers students and teachers; commercial use needs a licence.
Verified live 14 Oct 2026
Khan Academy — AP Calculus AB
Best for: self-paced practice and worked examples — a good safety net for students who need another pass at a topic.
Verified live 8 Oct 2026
Paul's Online Math Notes
Best for: complete, no-nonsense Calculus I–III notes and practice problems. A long-standing favourite for a reason.
Verified live 8 Oct 2026
3Blue1Brown — Essence of Calculus
Best for: the conceptual “why.” Animated intuition for derivatives and integrals — ideal as a pre-lesson hook or a revision aid.
Verified live 8 Oct 2026
OpenStax — Calculus Volume 1
Best for: a full, peer-reviewed, openly licensed calculus text — printable and free, when a class needs a reference book.
Verified live 8 Oct 2026
MIT OpenCourseWare — Single Variable Calculus (18.01SC)
Best for: lecture videos, notes and problem sets at university depth — for your own prep, or a student stretching beyond the AP syllabus.
Verified live 8 Oct 2026
AP Classroom — College Board
Best for: the teacher portal itself — AP Daily videos, the question bank, progress checks and your Course Audit home. Needs a free College Board teacher account to sign in.
Verified live 11 Oct 2026
NCTM — National Council of Teachers of Mathematics
Best for: the professional body for maths teachers in the US — journals, position statements and classroom resources, much of it open to non-members.
Verified live 11 Oct 2026
MAA — Mathematical Association of America
Best for: the college-side view of the same subject — curriculum guides and resources for the step between high-school calculus and a university course.
Verified live 11 Oct 2026
Math Medic
Best for: free, discovery-based lesson plans written by practising AP Calculus teachers — full units, bell to bell, ready to teach.
Verified live 11 Oct 2026
Desmos Classroom Activities
Best for: ready-made, teacher-paced activity screens: every student answers on their own device and you see the whole room's thinking at once. Desmos Classroom is now part of Amplify; the activities are the same ones.
Verified live 11 Oct 2026
Wolfram|Alpha
Best for: checking a limit, derivative or integral step by step before it goes on the board — and for showing students the difference between what a computer algebra engine sees and what it misses.
Verified live 11 Oct 2026
Math LibreTexts — Calculus
Best for: a whole shelf of free, openly licensed calculus texts, cross-linked and searchable — the fastest way to get a second explanation of one topic.
Verified live 11 Oct 2026
Professor Leonard — Calculus 1–3 lectures (YouTube)
Best for: complete, blackboard-style lecture courses filmed in a real classroom — ideal for a student who needs a slower full pass, or for your own refresher.
Verified live 11 Oct 2026
Wolfram MathWorld — Calculus
Best for: the precise statement. A free, hyper-linked mathematics reference for definitions and named results, useful when the textbook’s wording is not quite enough.
Verified live 12 Oct 2026
Active Calculus
Best for: free, open-source calculus texts in single- and multi-variable editions, aimed at an active-learning classroom.
Verified live 12 Oct 2026
Ximera — Mooculus
Best for: browser-based calculus course material — Calculus 1, 2 and 3 texts with the exercises built in, from the open-source Ximera project.
Verified live 12 Oct 2026
Math Insight
Best for: conceptual explanations with interactive graphics, strongest on multivariable and vector calculus — a second voice when a topic will not stick.
Verified live 12 Oct 2026
Mathispower4u — tutorial videos
Best for: short tutorial videos by James Sousa, organised course by course from Calculus I through III and beyond — handy when a student misses a lesson.
Verified live 12 Oct 2026
Kuta Software — Free Calculus Worksheets
Best for: free, printable calculus worksheets — ready-made practice pages you can hand out without extra prep.
Verified live 12 Oct 2026
Open Textbook Library — Mathematics
Best for: a catalogue of open textbooks that authors and publishers license to be freely used and adapted — the place to find a no-cost alternative text.
Verified live 12 Oct 2026
Brilliant — Calculus courses
Best for: interactive, guided courses covering pre-calculus through calculus. Paid subscription; Brilliant’s pricing page lists Individual and Family plans — see the site for current pricing.
Verified live 12 Oct 2026
Art of Problem Solving — Calculus
Best for: Art of Problem Solving’s calculus textbook, part of its grades 5–12 book series. Paid; see the site for pricing.
Verified live 12 Oct 2026
MasterMathMentor.com
Best for: free, classroom-ready calculus materials. Listed here as a paid placement — an advertiser on Calc21, not calc21 content.
Verified live 8 Oct 2026
Know a resource that belongs here — or one above that has gone stale? Tell us and we will check it.