Larry Zimmerman is the instructional director at Chang Learning. Larry has extensive experience in academics and has been teaching mathematics for over 40 years. Until 2004, he taught at Brooklyn Technical High School, one of New York City’s specialized secondary schools. Larry has been involved with math competitions and has coached students at all levels. He was one of the two primary authors of the ARML and NYSML competitions from 1983 until 1994 (NYSML until 1992) and was a grader of the 2001 International Mathematical Olympiad. Many of his former students have enjoyed distinguished records of achievement and include Intel (formerly Westinghouse) Science Talent Search finalists and USAMO and IMO participants.