One part of the Merrill and Tennyson model for concept teaching consists of expository presentations of the concept arranged from easy to difficult. This study showed that the presentation order, i.e., the order of difficulty, does not significantly affect student achievement. (Author/RM)

Describes strategy analysis procedures which enable preservice teachers to implement science lesson segments in a manner that was consistent with strategies incorporated into science teaching models. Conformity to the model was uniformly high for phases related to preparing the learner, investigation planning, and data processing. (JN)

This monograph consists of 17 research studies in science education. Among the areas investigated in these studies are: modeling and monitoring of college level science education; classroom processes and their relationships with short-term outcomes in elementary school science; expectations of the scientific enterprise; a science laboratory safety…