“…Definitions of teacher effectiveness typically seek to measure teacher/class effects on student progress in some way, while controlling for students’ prior attainment and other baseline measures using statistical models. In addition, because of the findings that teaching approaches and strategies typically vary across different school contexts, studies that explore the role of school context have often included case studies and argued for context specificity to be included in definitions (Teddlie & Stringfield, ; Luyten, ; Luyten & Snijders, ; Muijs et al., ; Day et al., 2006b; Creemers et al., ; Kington et al., ). Observational studies especially using systematic instruments developed in international collaborations have also highlighted variations in teacher behaviours and classroom processes and their associations with student outcomes (Campbell et al., ; Ko et al., ; Muijs et al., ).…”