The design and use of various types of mathematics learning centers are discussed; suggestions for evaluation of centers are offered. A sample learning center, designed to teach first graders linear measurement, is described in detail. (SD)

Describes a college-level chemistry laboratory format in which students individually schedule their laboratory time and use a slide-tape medium in place of a laboratory lecture. (MLH)

Variations on familiar games which can be used to motivate mathematics learning are described. (SD)

Several activities in which students use geometric shapes and their shadows to study geometric concepts are described. (SD)

By experimenting with measurement on regular and irregular surfaces, students can give an appreciation of the nature of the measurement process. (SD)

Activities involving rolling dice and recording results in diverse ways introduce children to a variety of basic mathematical concepts. Several games and activities are described. (SD)

This inexpensive, effective chemiluminescence demonstration requires minimal preparation. It is based on the oxidation of oxalyl chloride by hydrogen peroxide in the presence of an appropriate fluorescent sensitizer. The reaction mechanism is not completely understood. (BB)

Two statistical tools, the Chi-square and standard error approaches, are compared for use in Mendelian genetics experiments. Although the Chi-square technique is more often used, the standard error approach is to be preferred for both research investigations and student experiments. (BB)

Using aerial photographs to study shrubs biomass allows students to avoid unpleasant working conditions and to study communities that are inaccessible or distant. (BB)

This symposium focused on the question: can colleges afford to continue offering high quality laboratory instruction at the undergraduate level. (Author/BB)

An experimental system, suitable for secondary schools, uses Chlorella vulgaris to demonstrate the effects of mercury and cadmium. Very low concentrations of mercury or cadmium decrease growth, whereas lead or arsenic have little effect. Further experiments show additive interactions between mercury and cadmium and antagonistic interactions…

This article looks at the problems of revision of laboratory courses. While revision of the syllabus of experiments is expensive, it is necessary to keep it up to date. The nature, causes, and rates of change in practical courses are discussed. (BB)

Describes an experiment that has been introduced in the organic chemistry laboratory program at Shepherd College, Shepherdstown, West Virginia. It illustrates microbial reaction and its role in the synthesis of vitamin C. (HM)

Presents a biochemistry experiment for college students that illustrates the purification of an enzyme. (HM)