Advanced Placement Chemistry (also known as AP Chemistry or AP Chem) is a course and examination offered by the College Board as a part of the Advanced Placement Program to give American and Canadian high school students the opportunity to demonstrate their abilities and earn college-level credit. AP Chemistry has the distinction of having the lowest known test participation rate, with 49.5% of AP Chemistry students taking the exam in one study. Another, smaller, study found that 52.7% of students enrolled in AP Chemistry took their course's AP test.