Waggie, FirdouzaShuro, Linda2022-03-032024-11-072022-03-032024-11-072021https://hdl.handle.net/10566/19195Philosophiae Doctor - PhDSubstance abuse among adolescents is a Public Health concern globally with approximately 25 million adolescents (aged 13-15 years) who smoke tobacco, one in every ten girls and one in every five boys. In low- and middle-income countries, 14 % of girls and 18% of boys (13-15years old) are engaged in alcohol use. The Global Status Report on Alcohol and Health of 2018, reports that among the 15- to 19-year-olds, greater than a quarter were current alcohol drinkers. Cannabis (marijuana/dagga) is highly used globally with approximately 3.8% between 15 and 64 years, about 188 million people used it once or more times in 2017. The most commonly abused substances are alcohol, tobacco, and cannabis (marijuana/dagga). In South Africa, most adolescents are found in schools and the average age of drug experimentation is 12 years with early onset of use at about ten years of age.enHealth promoting schoolsHigh school learnersSchool healthSubstance abuseAnti-substance abuse initiativeUniversity of Western Cape