The SAT reasoning test (formerly Scholastic Aptitude Test and Scholastic Assessment Test) is the USA's mose widely used admissions test among colleges and Universities.

It tests one's knowledge of subjects that are necessary for college success: reading, writing and mathematics. The SAT assesses the critical thinking skills for students who need academic success in college - skills that students learned in high school.

The SAT is typically taken by high school juniors and seniors. It tells students how well they use the skills and knowledge they have attained outside the classroom - including how they think, solve problems, and communicate. The SAT is an important resource for colleges. It's also one of the best predictors of how well students will do in college.