:/ This kind of makes me sad considering you were talking about mentally deficient parents. A lot of times no matter how the parent is the kid could turn out normal, and why should they not be able to experience the joy of raising a child like the rest of us? Most of the time the child can help out the parents and it makes them a stronger person, and not so quick to judge other people that are like their parents.
My mom is kind of mentally handicapped. She has a few problems with memory, and generally being able to put things together, but she still had me. I kind of take offense to the fact that you're saying it shouldn't have happened. Her status has nothing to do with my own education level, or ability to learn. In fact, I'm one of the first in my family to go to college, and that's a real job considering I've got a few problems myself.
Education in america has nothing to do with the teachers, or the government, it has to do with kids that are too damn lazy to pick up a book or do some research on their own. After all, school is the experience you make of it, and if you piss it away it's your own damn fault.