"Cannabis, which includes marijuana, hash and hash oil, has the highest prevalence of use after alcohol.
"In 2018-19, 18% of students in grades 7 to 12 (approximately 374,000) reported using cannabis in the year preceding the survey, unchanged from 2016-17. Past-12-month use of cannabis by both males and females was 18%, unchanged from the previous cycle. Students in grades 7 to 9 reported an increase in the use of cannabis (7%, approximately 73,000) compared to 6% in 2016-17, whereas cannabis use among students in grades 10-12 remained unchanged at 29%.
"The results of the 2018-19 survey showed that grade 7 to 12 students were on average 14.3 years old when they first used cannabis, unchanged from the previous cycle.
"Grade 7 to 12 students were asked about their methods of cannabis consumption. Among students who used cannabis, smoking (e.g., a joint, bong, etc.) was the most common method (76%, approximately 356,000), a decrease from 2016-17 (80%). The next most popular methods of cannabis consumption included consumption of edibles (an increase from 34% in 2016-17 to 45%, approximately 209,000), vaporizing/vaping (an increase from 30% to 42%, approximately 191,000), and dabbing (an increase from 22% to 28%, approximately 125,000). Drinking cannabis was the least reported method of consumption among students (15%, approximately 67,000), unchanged from 2016-17. Approximately 26% of students who used cannabis (approximately 115,000) also reported using another method, unchanged from 2016-17."
Government of Canada. Summary of results for the Canadian Student Tobacco, Alcohol and Drugs Survey 2018-19. Published Dec. 23, 2019.