 He began his career in primary education while an undergraduate, teaching at the Children's Community School (CCS), a project founded by a group of students and based on the Summerhill method of education.After leaving the underground, he earned an M.Ed from Bank Street College in Early Childhood Education (1984), an M.Ed from Teachers College, Columbia University in Early Childhood Education (1987) and an Ed.D from Teachers College, Columbia University in Curriculum and Instruction (1987).