So according to a new study , the more stressed a pre-K teacher is, the more likely they are to expel a student. Hmmm. So the more of a misfit a teacher, the more likely an innocent child is to be harmed, perhaps permanently, in school. The numbers are very striking: Of teachers who reported "high stress," 14.3 percent had a student that was expelled, from the 4,000 pre-K classes that were randomly surveyed for the report. But of teachers who reported "low stress," just 4.9 percent expelled a student. Boys? Expelled 4 and a half times more often than girls. Older children and African Americans? Also more at risk, according to the Foundation for Child Development, a private, low-income child-focused organization. Okay, some children are just not ready for school. And many teachers are in impossible situations. But it seems to me we have a serious problem here, some big red flags, and I have to wonder how No Child Left Behind, that munchkin-land like solution to real