Your daughter is a smart cookie. Can you show her the correlation between the person doing the teaching and the possible motives they might have for not telling the truth? Or fire better sex-ed her way via the planned parenthood website or some such? (I know you could do it yourself, but the planned parenthood site would have more authority than anyone's mom, even her own, with a teen.)

I'd register a complaint with the Education department at the state level, and anyone else who might listen, all the way up.