A light flasher was developed for use with the open-shutter photography technique in elementary-mechanics experiments. Details are given of its design and construction. Five experiments, for the elementary mechanics laboratory, which use flasher units are described. (DT)

Describes a computer-based homework grading system that accepts a constructed response by the student, multiple attempts, generation of new data for each student, records of performance, and provision of some feedback about answers. (Author/CP)

Presents a dice-playing game which mathematically unsophisticated students and school children can play to learn empirically the principles of radioactive dating and population growth. (HM)