Educational stakeholders are keen to know the magnitude and importance of different interventions. However, the way evidence is communicated to support understanding of the effectiveness of an intervention is controversial. Typically studies in education have used the standardised mean difference as a measure of the impact of interventions. This…

Success for All (SFA)[R] is a whole-school reform model that includes a reading, writing, and oral language development program for students in prekindergarten through eighth grade. Classroom reading instruction is delivered in daily 90-minute blocks to students grouped by reading ability. Immediate intervention with tutors who are certified…