Argues that the complex human behavior studied by educational researchers is by its nature unpredictable if not indeterminate. Concludes that research should focus on descriptions and interpretations of educational phenomena and not on the prediction and control of educational outcomes. (FMW)

The instructionally effective school is a function of six factors: teacher characteristics and behavior, administrator characteristics and behavior, student body composition, school learning climate, pupil evaluation, and curriculum material. This article discusses these factors, how their relative importance can be measured, and some of their…