Despite the prevalent use of observational measures in teacher evaluation systems, research has only recently begun to take into account how aspects of the instructional environment and lesson sampling design may interact with teachers' scores on these measures. Instead, one assumption guiding current evaluation systems is that the variation in…

Use of the Teaching Strategies Observation Differential (TSOD), a 10-category system for observing and classifying teacher classroom behavior, is discussed as it relates to training preservice elementary school science teachers. Contends that skill in the use of TSOD helps preservice teachers become more effective in bringing about desired pupil…