Children from violent homes don’t just do worse in school themselves; they affect their classmates’ achievement and behavior. So says a study by economists Scott Carrell of UC-Davis and Mark Hoekstra of the University of Pittsburgh in the new Education Next.
. . . 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 presence of troubled students lowers the academic achievement of higher-income classmates and worsens the behavior of low-income students, researchers concluded.