I give my AP Environmental Science students this packet to review in the evenings starting two weeks before their AP exam. They cover one section at a time and I quiz them over the material the next day in class. The review is a lot of writing! It covers the definitions and main points from throughout the year. My students highlight what they remember and could explain to me. If they don't remember something at all and need more information than the brief reminder in the packet, they have to look back at their class notes, reading notes, or do some research (sadly, the review can't cover everything in too much detail or it would be forever long). The goal of the packet is just to be a quick reminder of words an APES student should know and be able to have an intelligent conversation about. It works really well for my students and myself; if you decide you want to buy it, I hope you have just as much luck with it!