Student engagement is a pivotal contributor to academic achievement, retention, and well-being, and yet the role of teacher influence on engagement is poorly understood. This is in part due to the contextual and 'hidden' nature of student engagement, and as such, levels of student engagement are assumed through observable factors such as attendance and conduct. It is also due to the difficulty in mapping student engagement simultaneously with understanding the teacher practices used to influence it. This article reports on a pre-post case study in which student survey and teacher focus group data were analysed together, revealing the nature and depth of association between the practices adopted by teachers and student engagement. By comparing the change of engagement at a class or homegroup level, it was possible to identify how approaches used by teachers impacted various elements of engagement. Furthermore, it found a high correlation between teacher practices and change in student engagement at a class or homegroup level, providing the opportunity for teachers to learn what practices were effective in their specific context.