How these pages are made

Every topic page says at the top where it came from and whether it has been reviewed. This page is the long version, once.

The course structure

The structure of the site — courses, units, topics, and the numbered ideas inside each topic — is the College Board's own, taken from the current AP Course and Exam Description for each course. We use the College Board's unit and topic numbers and its codes (such as 2.1.A.1) so that what you see here matches your class and AP Classroom. We describe each idea in our own words; the Course and Exam Description's wording is the College Board's and is not reproduced. An automated check on every build fails the build if a sentence of that wording appears on any page.

The questions

Questions are compiled from a question bank built for this site. Each item is tied to one idea in the Course and Exam Description. Every wrong option is a documented misconception — a wrong idea that students actually hold — and each option carries a written reason, shown as soon as you answer.

The bank was drafted with AI tools working from the Course and Exam Descriptions, then passed through automated checks (every idea covered; four options and one correct option per item; no answer-position pattern; every wrong option linked to a misconception) and an AI review for correctness and depth. Items that failed were rewritten or removed. That process is why the bank exists at the size it does, and it is also why human review matters: AI review is not the same as a subject specialist reading each item, and we do not present it as such.

The Fix sections

Fix text is compiled from the same bank's definitions and misconceptions, then edited by hand into the short form you see. Where a section has not yet been edited, the page says so and shows the underlying material instead.

What "Reviewed" means

A topic marked Reviewed with a date has been read in full by a person against the Course and Exam Description, and any item or line found wanting has been fixed or removed. The date changes only when that happens again. Until then a topic says Specialist review in progress, and you should treat it accordingly.

Who

The site is compiled and reviewed by a physics graduate (MSci, University of Bristol) and qualified teacher (PGCE, University of Oxford) with more than a decade of one-to-one science tutoring. It is independent and is not affiliated with or endorsed by the College Board.