1600.now

1600.now is free SAT prep built by a high school student. Students can search more than 8,500 original SAT-style Math and Reading & Writing questions by skill and difficulty, work through explanations, and move to timed modules or full practice tests. It is useful for independent study and for librarians or counselors who want to point a student to one specific skill. There are no ads or paid features, and students can start without an account.