The two most common college admissions tests are the SAT and ACT, both of which are usually taken during the senior year. And most schools use these test scores as a factor in admissions decisions. In fact, The National Association for College Admission Counseling (NACAC) reports that only five percent of four-year, regionally-accredited colleges do not place any importance on one of these two tests (although it’s important to know that not all colleges accept both).