In the Innovative Professional Development (iPD) Challenge, the Bill & Melinda Gates Foundation is helping school districts redesign their teacher professional development systems to better support teachers in increasing student success. This Issue Focus introduces the iPD Challenge and presents some early findings from MDRC’s study of it.
The Importance of Evidence
In this essay, adapted from remarks made to the Growth Philanthropy Network/Social Impact Exchange 2014 Conference on Scaling Impact, MDRC President Gordon Berlin explains why developing reliable evidence of effectiveness is critical when expanding programs to a large scale.
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.