And that's still millions of high school parents, one in four. More than 90 percent said such screening should be going on. These results are among several in the poll that raised concern about the risk of more attacks of the kind that struck Columbine High School. Nearly a third of students have heard a classmate at their school threaten to kill someone. One in five students report classmates at their school whom they consider to be neo-Nazis or skinheads.
Parents are less likely to know about it.
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