Every year, eager and energetic high school students study for Advanced Placement (AP) exams that will earn college credit for them before they ever step foot in a college classroom. These exams come in dozens of subjects from U.S. History to Physics and from Spanish to Art History. But according to The College Board, the non-profit group that administers the tests, here are the five most taken tests by the class of 2007:

• U.S. History - 333, 561 times
• English Literature and Composition - 298,478 times
• English Language and Composition - 282,230 times
• Calculus AB - 211,693 times
• U.S. Government and Politics - 160,978