For every What Works Clearinghouse (WWC) review, reviewers will be asked to complete a Study Review Guide (SRG). A completed SRG should be a reviewer's independent assessment of the study, relative to the criteria specified in the review protocol and the WWC Procedures and Standards Handbook (Handbook). At the end of the review process, a Master…

Research has shown that teacher effectiveness is the most important school-based factor that influences student outcomes, including student achievement. Studies have also shown that there is substantial variation in teacher effectiveness, such that some teachers improve student outcomes at a much faster rate than others. The strong influence of…