Describes an approach which begins with observations and systems familiar to the student and proceeds to develop and test models to explain them. Experimental topics include Brownian motion, a germinating cell, phase change of p-dichlorobenzene, extension and contraction of rubber, and an enzyme system. (GS)

The laboratory of an organic chemistry course for dietetics students is based on the learning cycle approach (exploration, invention-concept introduction, and concept application). The laboratory program is divided into four sections: lab techniques, compound types, reaction types, and reaction characteristics. (SK)

Presented in this document are essays related to a research project focusing on conceptual obstacles which confine and inhibit scientific understanding (conceptual barriers). These include a short summary of research activities; research methodology; outline of a theory and summary of supporting evidence related to conceptual barriers encountered…