In freshman year HS (1987) we all had a 1 semester mandatory Health class, and one section of the class (a week or so) was dedicated to sexual reproduction. Purely the medical aspects of it though, not teacher demonstrations or pr0n videos... geeze-- how's a geeky kid supposed to learn?

The answer: At that time--Thank god for darth vader costumes and fund raising fairs.*
They did split out the M's and the F's to go watch a 'special' film. I don't recall anything informative, mostly it was cheeeeeeeseeeeee. If you got through the cheese part, It was about the risks of pregnancy (what protection works best/worst) for the guys. It was just really badly presented... but I guess helpful.
Nowadays, TGFT Internet -- the holy grail of 2nd hand sex education, right?!!

Ha.
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*Just saw ROTN the other night on TV, that was 1984 and was on cable about the time I was in 8th grade.