"Sixty percent of high school students and 32 percent of middle school students say that students keep, use or sell drugs on their school grounds. For seven of the past eight years, at least 60 percent of high school students have said they attend a drug-infected school."

Source

QEV Analytics, LTD., "National Survey of American Attitudes on Substance Abuse XVII: Teens," The National Center on Addiction and Substance Abuse at Columbia University (New York, NY: National Center on Addiction and Substance Abuse at Columbia University, August 2012), p. 5.
http://www.casacolumbia.org/a…