Books in this subject area deal with the College Level Examination Program: a series of examinations that test an individual's college level knowledge gained through course work, independent study, cultural pursuits, travel, special interests, military service schools, and professional development. CLEP also offers international and home-schooled students the opportunity to demonstrate their proficiency in subject areas and bypass undergraduate coursework. The test is offered by the College Board. Approximately 2,900 colleges and universities will grant college credits for each test. Both United States and international schools grant CLEP credit.