They also have a negative effect on their classroom peers, resulting in decreased test scores and increased disciplinary problems, according to a new study by economists Scott Carrell of the University of California–Davis and Mark Hoekstra of the University of Pittsburgh, published in the summer issue of Education Next.
Carrell and Hoekstra find that adding one troubled student to a classroom of 20 students decreases student reading and math test scores by more than two-thirds of a percentile point and increases misbehavior among other students in the classroom by 16 percent.
The whole press release was originally published on The Hall Monitor
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