Linnie TumwebazeDr. Anne Tweheyo (PhD)Aheisibwe Irene (PhD)2025-11-212025-11-212025-09www.theadvancedglobaljournalofresearch.nethttp://hdl.handle.net/20.500.12284/867This study investigated the relationship between substance use and discipline among Ordinary Level students in Bushenyi District, Uganda. A convergent parallel mixed-methods research design was employed, utilizing structured questionnaires for quantitative data and interviews for qualitative insights. The sample size consisted of 75 participants, including 42 students, 19 teachers, and 6 deputy headteachers. The results indicated that alcohol was the most commonly abused substance, with 70% of respondents acknowledging its prevalence. The overall level of discipline among students was perceived as good, with a mean score of 4.16 across various indicators such as dress code, respect for teachers, and lesson attendance. Pearson correlation analysis revealed a weak but statistically significant positive relationship (r = 0.24, p < 0.01) between substance use and discipline, suggesting that increased substance use was associated with a slight decline in discipline levels. The study concluded that substance use among students is a significant concern that negatively impacts discipline. Recommendations included implementing comprehensive substance use education programs, fostering supportive school environments, and developing guidelines to promote positive student behavior.en-USCC0 1.0 Universalhttp://creativecommons.org/publicdomain/zero/1.0/RelationshipSubstance UseStudents' DisciplineSecondary Schools.Article