sentences:  He currently serves on the MAA's Committee on the Undergraduate Program and is a member of the Steering Committee for the next CUPM Curriculum Guide.He has produced DVD courses for The Teaching Company in the Great Courses Series on calculus, statistics, probability, geometry, and the joy of thinking, which have reached hundreds of thousands of people worldwide.Since 2000, he has given over 200 invited lectures and presented more than 35 workshops on effective teaching to faculty members.