The SAT (Scholastic Aptitude Test) helps colleges see how much you’ve learned and how well you will perform. It measures critical reading, writing and math skills, with a highest composite score of 2400.
The ACT (American College Testing) measures how well you’ve mastered your high school curriculum. It not only assesses how much you know, but how well you reason. It measures content-based knowledge of English, math, reading and science reasoning, with a highest composite score of 36.