Best practice suggests that curricular decisions be made on the evidence base of the content and the contextual fit of the curriculum to the school setting, and with coaching to help teachers effectively use curricula. Messages from the federal government encourage school administrators and researchers to consider the costs of a program. The…

Although it is common for researchers to assess implementation fidelity (IF) within the context of math intervention, IF assessments are often restricted to intervention adherence. Further, the degree to which IF influences observed outcomes is commonly ignored. The current study examined the relationship between three aspects of IF and the math…