Randomized controlled trials (RCTs) are considered the "gold standard" for evaluating an intervention's effectiveness. Recently, the federal government has placed increased emphasis on the use of opportunistic experiments. A key criterion for conducting opportunistic experiments, however, is that there is relatively easy access to data…

This "What Works Clearinghouse Procedures and Standards Handbook (Version 3.0)" provides a detailed description of the standards and procedures of the What Works Clearinghouse (WWC). The remaining chapters of this Handbook are organized to take the reader through the basic steps that the WWC uses to develop a review protocol, identify…

Success in Sight focuses on the interrelated parts of an education system. This systemic school improvement intervention is designed to address schools' specific needs while building their capacities to plan, implement, and evaluate school improvement practices. It is intended to help schools, leadership teams, and teachers systemically engage in…

The 4Rs Program (Reading, Writing, Respect and Resolution) is a "dual focus" whole school universal intervention designed to promote literacy development and social-emotional learning, that is currently being rigorously evaluated using a school-randomized trial of 18 elementary schools (9 intervention, 9 control) in New York City. The…

Presented are the summary, conclusions, and recommendations after two years of the Experimental Freshman Year Program for underachieving high school graduates at Southern Illinois University. Findings are presented under four headings--(1) subjects' occupation or whereabouts in the year following their participation in the program, (2) retention…