In extending our understanding of how the social climate of schools can affect academic outcomes, this study examined the relationship between school bullying, student-teacher (S-T) connectedness, and academic performance. Using data collected in Canada as part of a larger international study conducted by the Organisation for Economic Co-operation and Development, participants included 27,217 students aged 15 years and 1,087 school principals. Results of multilevel analyses revealed that math achievement was negatively related to school bullying and positively related to S-T connectedness. For boys, there was a significant interaction between bullying and S-T connectedness, suggesting a buffering effect of S-T connectedness on the relationship between school bullying and math achievement. Similar results were evident for reading achievement. (Contains 5 tables, 4 figures and 2 notes.)