Ohio’s new teacher-evaluation system requires evaluators to conduct two, formal thirty-minute classroom observations. Yet these legally prescribed observations seem ripe for compliance and rote box-checking; in fact, they may not be quite the impetus for school-wide improvement that policymakers had hoped for.
If this does end up happening in practice, all is not lost. Rather, as I discuss below, informal channels for teacher feedback might actually be more conducive to helping teachers (and their schools) improve than formal procedures.
Consider Will Dobbie and Roland Fryer’s recent work on New York City’s charter schools. The research duo takes great pains to uncover what school-based factors make a great school tick. In my estimation, one of their key findings is how strongly the frequency of informal teacher feedback correlates to school effectiveness.
Dobbie and Fryer measure school effectiveness in two ways. For the full sample of thirty-nine schools, they use a statistical model (a matched student-pair approach) to estimate a school’s impact on achievement. Second, for twenty-nine of the schools, lottery-admissions data were used to estimate school effectiveness. Lottery-based computations are typically considered preferable, because researchers can approximate a random experiment. The researchers then probe the schools’ “inner-workings” during the...