Describes procedures for choosing process skill materials for evaluation. Steps include selecting software titles, reading descriptions, and skimming for key phrases associated with process skills, examining courseware, considering cost versus time, and the selecting process. Sample forms for the evaluation process are included. (RT)

The concept of the density of a material has an important role in elementary and secondary school science curricula, but it is a difficult concept to grasp. This project explores why this should be and whether there are some simpler, more accessible notions which can serve as the basis for building a concept of density in students' minds during…