Many things have contributed to this problem. Federal judges legislating from the bench created forced busing, which has caused far more problems than it solved. When children are bused past a school two blocks from their home to one a half hour away, it makes it much more difficult for parents to get involved with the school and get to know their children's teachers. Local judges and school boards have tied the hands of teachers and administrators alike to the point where effective discipline is just a memory in many schools. The hippies of the sixties and seventies are now in charge of the NEA and the school boards, and are sitting on judge's benches.
High schools distribute condoms to students against the wishes of their parents.
School nurses counsel young girls on how to get abortions without telling their parents. My major complaint about public schools, and the reason my daughter, Sarah, will never attend one, is the religion that is taught there. I know, you've been told that religion is no longer allowed in public schools. Teachers have been fired for having a Bible in their private work areas. Children have been expelled for discussing the Bible with their classmates during their lunch period.