Purpose: To be effective, evidence-based programs should be delivered as prescribed. This suggests that adaptations that deviate from intervention goals may limit a program's effectiveness. This study aims to examine the impact that number and quality of adaptations have on substance use outcomes. Design/methodology/approach: The authors examined…

This study investigates inter-school variations in several dimensions of opportunity to learn as well as examines the extent to which these measures significantly affect students' performance on grade 7 literacy and numeracy exams. After situating the study within the global discourse emphasizing the importance of providing access to quality…