If you need to know it, it's in this book. Cracking the AP World History, 2012 Edition, includes:
* 2 full-length practice tests, fully updated for the May 2012 Exam
* Comprehensive review of all topics from prehistoric times to the present
* Timelines, summaries, and key term lists in every chapter
* Helpful strategies for writing high-scoring DBQ and free-response essays
* Advice on how to use Process of Elimination to maximize your multiple-choice section score
* Updated strategies which reflect the AP test scoring change
* Detailed explanations for every practice question