PSAT 8/9 tests the same skills and knowledge as in PSAT/NMSQT or PSAT 10. This test is taken when you are in 8th or 9th Grade. It is up to the schools to choose a date between Sept. 28, 2015 and Jan. 29, 2016 or between Feb. 22 and March 4, 2016. It serves as a preparation for the real SAT and at the same time a diagnostic test that will help you and your teachers to have a better knowledge on the strength and weakness of you.