I don't think it should be mandatory unless it's mandatory for everybody because whether the woman can be 15 and know more about how to raise a child than a woman who is 25 and the 25 year old wouldn't have to. It's not like they're all alone on giving birth; most of the time there is some type of family support and friends supporting you.
Depends, still should be put into High Schools though. Unless they abort ( Which I mildly suggest at such a young age, in our system it will likely crush their future unless they are rich ). The Next generation is the most precious thing we have.