Discusses the use of a modified electron spin resonance apparatus to demonstrate some features of the expression for the transition probability per second between two energy levels. Applications to the third year laboratory program are suggested. (CC)

Describes a simplified diffraction experiment offered in a workshop with the purpose of illustrating to high school students the relation of science to society. The radii determined for cigarette smoke particles range from 0.2 to 0.5 micrometer in this experiment. Included is a description of the diffraction theory. (CC)

Article is a demonstration lesson on Archimedes' Principle for Elementary school students. (GB)

Directions are given for the construction of mazes suitable for use in the classroom. The animal maze may be used to investigate small animal behavior, and the finger maze provides students with the opportunity to experience similar frustrations to those encountered by animals in the network of passages. (JR)

Describes a semester-long field trip in which 26 students of the University of Colorado studied the geology of the western United States. Only four of the participating students were geology majors. (JR)

In the transition from the traditional science teaching approach to an activity centered curriculum, useful pieces of scientific equipment are often no longer needed and stored. Suggests ways in which the resourceful teacher can use this equipment to supplement the new curriculum with additional student activities. (JR)