Khan Academy AP review: the best free option

Khan Academy offers free AP courses built around College Board’s course and exam descriptions, with videos, articles and practice exercises. Its new AP Precalculus course and revised AP Calculus AB course also add free-response support: AP-style prompts, sample student answers and scoring information.

From Khan Academy’s own blog. Checked October 12, 2026. Subject coverage and features vary by course; check the course you need. We have not tested it hands-on, so this review has no score.

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The short verdict Rated Not scored / 5

Price today

Free

Access

Free, no time limit

Best for

Learning or re-learning content at no cost

Skip it if

You need realistic full-length exams in every subject

Price

Free

Videos, articles, exercises

Alignment

CED

Current Course and Exam Descriptions

FRQ support

Yes

AP Precalculus and Calculus AB

Account needed

Free

To save progress

What stands out

Completely free, with no subscription.
Built around College Board’s course descriptions, unit by unit in the newer courses.
Free-response practice with sample answers and scoring in AP Precalculus and Calculus AB.

What to watch for

Coverage differs by subject; not every AP course has the same depth or exam-style practice.
Pair it with College Board’s past free-response questions and a Bluebook preview for exam practice.

Best AP prep

Free AP resources

Official source & community discussion

Khan Academy (official) → See related questions on Quora →