Many colleges and universities require a standardized test such as the SAT or ACT for admissions. The reason colleges and universities require these tests is to have a consistent way of measuring students who are applying to the school.
The Scholastic Aptitude Test, or SAT, is usually taken your junior and/or senior year. It is better to take it your junior year so that you can re-take it if you don’t like your score and want to improve it. This test, most of the time, is a major part of your overall college application. To help prepare for the SAT, students take the Preliminary Scholastic Aptitude Test or PSAT. This test is offered every October, and can be taken your freshman, sophomore, and/or junior year. The SAT occurs from October to June (check http://www.collegeboard.com/ for specific dates).