Reports the procedures and results of a student investigation of the performance of a miniature diesel engine. The experiments include (1) torque measurement, (2) power measurement, and (3) variation of power output with applied load. Bibliography. (LC)

This article presents a review of the experimental studies that have been conducted to determine the effectiveness of discovery learning as compared to expository learning in science and mathematics. The limitations of these studies are noted and some suggestions for future research are proposed by the author, who is an assistant professor of…

Describes the use of computers equipped with plotters to predict tides using the known period, phase, and amplitude of the major tidal components. Other demonstrations and projects are described. (RR)

Suggests recording student science experiments on videotape for class analysis. Analysis includes examining the experiment's purpose, its components, and students' techniques in performing it. Furnishing students with a checklist of things to look for while viewing experiments is recommended. (Author/JN)

Laser enhanced ionization (LEI) occurs when a tunable dye laser is used to excite a specific atomic population in a flame. Explores the origin of LEI's high sensitivity and identifies possible avenues to higher sensitivity by describing instrument used and experimental procedures and discussing ion formation/detection. (Author/JN)