Since typically parents do a VERY poor job of explaining it, children naturally out of curiosity get involved to find out first hand. For only that reason, I think schools should teach it, to include all the problems associated with pregnancy, venereal deceases, the fathers getting cold feet and sometimes accusing the woman of sleeping around, causing much grief, the end of career dreams, etc. I think only a little needs be shared concerning the process, and a LOT more concerning the numerous drawbacks to it. I do think a majority of parents should agree what the class will be teaching before the class goes forward. As to the age... I am not sure, but it should be before the girls can get pregnant.