Most foreign educational institutions require international students to establish their knowledge and English language proficiency as part of the admissions process through standardized tests like GRE, GMAT, SAT, ACT, TOEFL and IELTS. These tests are a common measure of the skills and abilities of students from different educational backgrounds and play a very important role in determining whether or not a student is admitted to his or her schools of choice. So learn as much as you can about these tests and prepare in the best manner possible before you take these tests.