Wikipedia reports that the number of states offering comprehensive sex education has declined over the last 14 years. At the same time, the National Campaign for the Prevention of Teen Pregnancy which advocates comprehensive sex education reports-” Since its peak in 1991, the teen birth rate declined by 64%. In the past year alone, it dropped by 8%.”
There is a disconnect here between the policies advocated and the aggregate results. In fact, some have argued that comprehensive sex education actually increases sexual activity among teens (with predictable results?).