Joseph G. Rosenstein has focused on K-12 mathematics education for the past 20 years. He has played a major role in developing New Jersey's mathematics standards and was the editor and a principal author of the New Jersey Mathematics Curriculum Framework. Since 1991, he has served as the Director of the New Jersey Mathematics Coalition and is now the Director of its successor, the New Jersey Mathematics and Science Coalition. He writes articles on mathematics education and instructional materials for K-12 teachers of mathematics, focusing on discrete mathematics. He has frequently been interviewed about issues relating to mathematics education within the state and nationally.