I agree. I have a friend who does this full time. Their materials are excellent and they're accurate. The kids respond to it well. It's the teachers and consultants who have given them a problem.
Well, not just them. When I was in High School we had a very complete sex education course with information on sperm travelling through to the ovaries, all the birth control methods, including abstinence, everything you ever wanted to know but were afraid to ask. It was quite interesting given that I went to a Roman Catholic High School. Anyway, one girl told us you didn't have to have intercourse to get pregnant. She knew because she had read it in Dear Abbey (Abby?).
It takes more than materials and a classroom to educate a child.
Shalom.
My wife got pregnant when she touched mine. ;)