A large body of literature documents the central importance of fidelity of program implementation in creating an internally valid research design and considering such fidelity in judgments of research quality. The What Works Clearinghouse (WWC) provides web-based summary ratings of educational innovations and is the only rating group that is…

Multiple sources of influence impact the decisions about what and how teacher educators are expected to operate, including the innovations that are adopted. Some of those sources of influence (such as teacher certification boards) can demand that certain curricula be adopted, specific instructional procedures be utilized, and delineate the…