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What Two Rigorous Studies Tell Us
This synthesis reviews findings from two rigorous, large-scale evaluations — the Professional Development in Reading Study and the Middle School Mathematics Professional Development Impact Study. Both interventions had only limited effects on teachers’ knowledge and instruction and no impacts on students’ test scores. The report ends with suggestions about how professional development might be improved to achieve better results.
In a study sponsored by the Institute of Education Sciences, intensive professional development programs for seventh-grade math teachers were implemented as intended, but teacher turnover limited the average dosage received. The programs had no impact on teacher knowledge or student achievement.
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.
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