Describes two experiments in physiology using a readily available marine vertebrate, the flounder. Representative results are presented from experiments which measure the effect of excess potassium on the flounder EKG, and the effect of temperature on heart rate of the starry flounder. (JR)

Describes simple quantitative determinations for ethanol and carbon dioxide, together with techniques for examining the effects of a number of environmental factors on their production. The experimental work centers around the growth of a cell population of yeast, and is suitable for senior high school students. (JR)

Describes two experiments using carbon dioxide cartridges to demonstrate Newton's third law of motion. (JR)

Problems in constructing and revising mathematical workcards are discussed, with four sample workcards included. The Fife Mathematics Project, incorporating workcards and other instructional techniques, is described. (DT)

Grade 8 students using the Introductory Physical Science course improved their scores on a test of science processes (observing, comparing, classifying, quantifying, etc.) after studying the first five chapters of the materials. Some evidence supporting a hierarchy of process skills is reported. (AL)

Examples are given of activities that begin with the classification of objects into sets and lead to concepts and activities in other branches of mathematics, in language arts, and in science. (DT)

This column discusses problems involving a paper folding game for bicimals, the sum of exterior angles of polygons and polyhedra, solving quadratic equations in finite arithmetics, nomograms, and cube folding patterns. (DT)

Describes material used in a first semester introductory physics laboratory for nonscience majors. The computer is used for data manipulation and in some cases, computer programs allow simulation of experiments with the possibility of altering values of parameters or experimental details. (Author/TS)