This can lead to poor school, athletic, or work performance.
The study found that in the poorest schools, the number is even lower: about 10 percent.
But she was determined not to let poor schools drive her out.
The least experienced teachers end up at the poorest schools.
"You're a poor school, but we buy every year some new furniture."
Yet poor schools today attract the bottom third of the college class.
We'd raise salaries for teachers in poor schools by 50 percent.
One reason poor schools can do so well, she says, is Federal aid.
Yet many people feel that poor public schools are a national problem.
Most of these students come from small villages with poor schools.