2. The American College Testing assessment (ACT) and Scholastic Aptitude Test (SAT) are the two main college entrance exams administered in the United States.

While the SAT measures a student's ability to learn, the ACT was created as an alternative, measuring a student's educational development. Although many US colleges accept both exams, most students take the ACT. Each year nearly two million students pay a registration fee of about $50 to take the test, which is administered six times throughout the year. Students can also retake the exam for a better score.

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