Abstract
Eighty-nine fifth grade teachers were studied to establish the temporal stability of their relative effectiveness on the average level of students' educational achievement in two consecutive years. Residual gain scores for these teachers' classes were correlated across years. The correlations range between .13 and .49 for different subtests of the Metropolitan Achievement Test used to measure student achievement. The correlations are found to represent a relatively small overall impact of teacher consistency on the achievement levels of students.

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