Most students study for AP exams the same way they study for everything else: re-reading notes and highlighting the textbook. That approach feels productive, and it is one of the least effective methods for actually retaining material long enough to use it in May.

Most students find AP resources the hard way, by asking around or stumbling onto them in a group chat. Here is the actual landscape, sorted by what is official, what is free, and what is worth paying for.