Describes an experiment which can be used to provide an introduction to study of reaction mechanisms and training in use of simple analytical and instrumental techniques. (PS)

Six new experiments are described for use in elementary school classrooms. Phenomena explored include friction, mass of air, kinetic energy, air condensers, and hot-air balloons. Instructions are explicit. (PS)

The concept of energy consumption can be learned by role playing, using jelly beans as units of energy with children as primary, secondary, and tertiary consumers. Follow-up questions are suggested for further discussion. (PS)

Describes activities for learning the metric system of measurement in elementary school classrooms. (PS)

The ratio of electronic charge to Boltzmann's constant can be easily determined by measuring the short-circuit collector current versus the emitter-base voltage characteristic of a silicon transistor connected in the common-base mode. (Author/DF)