Children have a natural inclination to play and imagine themselves as characters. Research has supported theories that connect this pretend play and related theatrical play to the development of children's social and emotional skills, but the author contends we need further, more rigorous research on whether such play directly relates to such…

The purpose of this paper is to propose a framework for conceptualizing and assessing fidelity of implementation (FOI) in the context of a cluster-randomized design study. A research-validated mathematics curriculum for preschool children called Numbers Plus is used as an example to describe the role of curriculum implementation fidelity in the…