This article describes elements of an approach to research and development called design-
based implementation research. The approach represents an expansion of design research …

This introduction presents an overview of the key concepts discussed in the subsequent
chapters of this book. The book provides readers with a deeper understanding of validity …

This paper describes elements of an approach to research and development called design-
based implementation research. The approach represents a significant expansion of design …

Background/Context Researchers have found that teachers' effectiveness at increasing
student achievement improves during the first few years on the job. Yet little research maps …

The number of mathematics coaches in schools has been increasing, but evidence is
needed to support policy decisions on the use of mathematics coaches and their work in …