Previously, the education system in Manitoba used the ‘senior’ terminology but in the past couple of years the system has reverted back to the use of ‘grades’. [...] Table 1 below shows the percentage of males and females in each grade who have used alcohol, cannabis and other drugs in their lifetime and in the past year. [...] According to the Atlantic Alcohol Risk Continuum, 11.5% of grade 7 and 8 students and 17% of senior students meet the criteria of being high risk - alcohol dependency. [...] The scales are based on the Stages of Change theory (Prochaska, DiClemente & Norcorss, 1992) and allow participants to be rated on a continuum of risk which provides a better picture of the levels of harmful drug and alcohol use behaviour in the sample compared to a measure such as the Alcohol Use Disorders Identification Test (AUDIT). [...] As nearly all the analysis in this report is expressed as a function of gender and grade, students who failed to disclose this information were also excluded from analysis as their 4 Due to potential ethical issues with school-based research, only 10 indicators of the AARC were asked of the senior grade students (compared to a total of 12) and for the ADRC we exchanged one question that may have p