Scores from the SAT and ACT can be used for up to five years but for the IELTS and TOEFL exams the scores last only for two years. By taking these exams in their early years of school students can have the room to retake the tests in case they need to. A lot of students who attend SAT Classes in Dubai take the test for the first time in 11th grade and then spend the start of 12th grade working on getting better scores so that they can submit their highest results when applying. https://anilkhare.com/blog-when-to-take-sat-act-ielts-or-toefl-based-on-target-country.html