Focuses on constructivism and lists some of the procedures that teachers use to illustrate the constructivist learning model. Describes characteristics of a classroom that is using the constructivist model. First published in 1991. (YDS)

Chemistry can be described on three levels: sensory, molecular, and symbolic. Proposes a particle approach to teaching chemistry that uses magnets to aid students construct molecular models and solve particle problems. Includes examples of Johnstone's model of chemistry phenomena, a problem worksheet, and a student concept mastery sheet. (MDH)