New research attempts to determine the best way to measure principal effectiveness using students’ test scores—and finds that the task is trickier than anticipated. Principal evaluation ...

For example, some argue implicit bias training is not useful because it doesn’t change IAT scores. But if IAT scores are not valid in the first place, they are not likely to be effective evaluation ...

Yet Fuess prefers this test to basing his evaluation on schoolwide reading or math test scores—a practice he calls “offensive.” “It makes me question the purpose of the evaluation system ...