The Center for Addictions and Mental Health (CAMH) released the 2011 Ontario Student Drug Use and Health Survey (OSDUHS) Mental Health and Well-Being Report today. The report reveals important trends in mental and physical health and risk behaviours among Ontario students, as reported in EurekAlert. CAMH’s Ontario Student Drug Use and Health Survey is the longest running school survey of adolescents in Canada. Between October 2010 and June 2011, 9,288 students in grades 7 through 12 from 181 schools across the province participated in the survey, which was administered in classrooms by the Institute for Social Research at York University. Today’s report describes mental health, physical health, and risk behaviours among Ontario students in 2011, as well as changes since 1991 (where possible).