David Jerner Martin (Ph.D.) is Professor Emeritus of Early Childhood Education at Kennesaw State University. A gifted teacher and an outspoken advocate of constructivist-based teaching, he is best known as the author of the pioneering text, ELEMENTARY SCIENCE METHODS: A CONSTRUCTIVIST APPROACH, now in its Sixth Edition. Dr. Martin has consulted on constructivist teaching at home and abroad, and was technical consultant with The Weather Channel for The Weather Classroom. He has received several university awards for distinguished teaching and publications.