"The results showed that students who used marijuana
in general exhibited poorer behavior on all measures
than students who did not use marijuana;"
Marijuana Use at School and Achievement-Linked Behaviors Kristin V. Finn The High School Journal Vol. 95, No. 3 (February 2012/March 2012), pp. 3-13 Published by: University of North Carolina Press Stable URL: http://www.jstor.org/stable/41343019