Lawrence Leff is former Assistant Principal, Mathematics Supervision, at Franklin D. Roosevelt High School, a large urban high school in Brooklyn, New York. Mr. Leff served on many local mathematics committees including a term as a member of the New York State Regents Exam Preparation Committee. He has a strong interest in developing and publishing reader friendly mathematics review courses. Mr. Leff has used his many years of experience teaching and supervising all levels of high school mathematics classes, including SAT Math preparation classes, to create a highly effective SAT math study program.