Illiterates: True, but you won't solve that problem through the schools alone. My son had some pretty brutal English teachers. Even so, it's my brilliant opinion that he got to be a great writer because his mother and I never stopped telling that we expected him to achieve a certain level of proficiency. Without the parents sending the same message as the teachers, half the formula is missing.
Now, about sex education: There have been plenty of surveys which indicate that 1/3 (or more) of parents tell their kids NOTHING about sex. It stands to reason that those same parents have low expectations for their kids' academic achievements, so my conclusion is that some of those kids will not be resourceful enough to find accurate information on their own.
What do you suppose are some of the results of misinformation, or lack of information?