So as a freshman I only took human geography. Got a 5. Right now as a sophomore I'm in AP euro. That's an easy A. I will probably get a 5 or 4. But next year I am signed up to take AP stats, macro, psychology, and US history. I'm not used to doing more than one exam and I'd usually just buy the Princeton review guide and read it the week before the test. So I'm wondering what you guys do/would do? Should I just buy 4 Princeton review guides?