Sexuality Information and Education Council of the U.S. 
Incorporated in 1964, SIECUS develops, collects, and disseminates information, promotes comprehensive education about sexuality, and advocates the right of individuals to make responsible sexual choices.
http://www.siecus.org/Healthy Visions 
Educates students and young adults to make informed decisions about sexual health, relationships, unwed pregnancy, and adoption.
http://healthyvisions.org
AIDS and Sex Education 
Describes a number of activities that can be used to educate young people, parents, and teachers about HIV infection and AIDS. Also offers statistics, news, quizzes, and printable resources.
http://www.avert.org/educate.htm
The Mirons 
Amy G. Miron, M.S. and Charles D. Miron, Ph.D. are sexuality and relationship educators and certified sex therapists. Site offers biographies, a publication list, workshop details, and contact information.
http://www.themirons.com
Avert - Lesson Plans for Youth AIDS Education 
Describes a number of activities that can be used to educate young people about HIV infection and AIDS. Includes statistics, stories, quizzes, and news.
http://www.avert.org/lessons.htm
The Birds, the Bees, and Me 
Video designed to open communication between parents and children. Discusses puberty, sex, and childbirth. FAQs, ordering information, and testimonials.
http://www.birdsandbeesvideo.com
Postponing Sexual Involvement 
Program at Children's Hospital Medical Center of Cincinnati designed to help teenagers learn to cope with and resist pressures to become sexually active at early ages. This is a program brochure rather than an educational resource.
http://www.cincinnatichildrens.org/svc/alpha/p/psi/default.htm
United Kingdom Training Initiatives Ltd. 
Sex and relationship education training initiatives including: programs, books, and materials aimed at training with schools, colleges, and beyond.
http://www.uk-ti.com