There are so many AP World review books on the market, but not all of them do the same thing!
AP World History Crash Course, by Jay Harmon
Preparing for the AP World History Exam, by Barbara Brun-Ozuna, et.al
Cracking the AP World History Exam (Princeton Review) by Monty Armstrong – Good on skill-building for test-taking approaches.
5 Steps to a 5: AP World History by Peggy Martin – Good for giving broad trends and themes in world history, great CCOT charts for different themes.
Kaplan AP World History by Patrick Whelan and Jennifer Laden – Great reviews of it from AP World teachers overall, though Patrick has told me that he has not had much to do with the revisions of the book since 2011.
Though I always provide the caveat to my students that they should always go by what I have taught them in class, or just check in with me about the accuracy of their statements and effectiveness of their strategies if they are unsure. Although many of the authors are AP World History teachers who are at the top of the field, I don't always know what may happen in the final edits of a review book.
Online Review Sites
There are more and more online review sites out that that help students review, usually for a fee. There are a few sites that offer some free services, but if you want more, will ask for your money. The quality of what is online is inconsistent, but serve its purpose in helping you review content.
Of course, there are plenty of videos out there that could help you review, but the best series by far (the exception) are the ones by John Green, Crash Course World History. Crash Course World History Series 1 playlist: https://www.youtube.com/playlist?list=PLBDA2E52FB1EF80C9 Crash Course World History Series 2 playlist: https://www.youtube.com/playlist?list=PL8dPuuaLjXtNjasccl-WajpONGX3zoY4M There are more videos below -- depends on how your students or you want to spend your time! AP Review in 12 minutes TED-ED Videos: There is an increasing number of history videos that are excellent to use for review! Browse through the Social Studies --> History topics. Some of my favorites to show through the year or as a review are: Atlantic Slave Trade Silk Roads Five Major World Religions
FINALLY, I have collaborated with a few other teachers across the nation to bring live online chats for students to do review in the evenings. See link below for the 2016 schedule of online reviews: ONLINE WHAP Review-A-Palooza