This paper illustrates how to design an experimental sample for measuring the effects of educational programs when whole schools are randomized to a program and control group. It addresses such issues as what number of schools should be randomized, how many students per school are needed, and what is the best mix of program and control schools.
A Look at Early Implementation and Impacts on Student Achievement in Eight Elementary Schools
Methodological Lessons from an Evaluation of Accelerated Schools
How to Help Hard-to-Employ Individuals Get Jobs and Succeed in the Workforce