National Guidelines Task Force. Guidelines for Comprehensive Sexuality Education, 2nd Edition, Kindergarten-12th Grade. New York: Sexuality Information and Education Council of the United States, 1996.

Cohen, J. and P. Wilson. Taking Sex Seriously : Practical sex education activities for young people. Liverpool: Healthwise Helpline, 1994.

"Teaching Sex Education in the Public Elementary Schools," phone survey, Peter D. Hart Research Associates, Inc., February 20-26, 1999.