ACT The ACT is America's most widely accepted college entrance exam. It assesses high school students' general educational development and their ability to complete university/college-level work.
SAT The SAT (Scholastic Aptitude Test) is administered by the College Board. There are two sections to the test: Evidence-Based Reading and Writing and Math. Each is scored on a 200-800 scale.
TOEFL - Test of English as a Foreign Language - The TOEFL test is a requirement for admission into colleges and universities where instruction is in English. The exam is usually required of students whose first language is not English.
IELTS - The International English Language Testing System