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 number of undergraduate laboratory experiments that illustrate the science of alchemy as it was historically practiced. (MLH)

Describes a dry-lab experiment in which the student is provided with a set of fluorescence spectra of quinine for study and interpretation. (MLH)

Describes undergraduate experiments concerning three topics: oxygen carriers, nitrogen fixation, and metal activated enzymes. (MLH)

Describes a simple microwave interferometer capable of measuring small phase shifts. Proposes laboratory exercises involving the use of the interferometer in the determination of refractive indices of gases and the analysis of the reflection in a test chamber. (Author/CP)

Topics discussed are: what the city is, what a good urban school is not, and criteria of good urban schools. Approaches that maximize and utilize the city as a center for learning are given through an examination of five models of urban schools. (Author/AM)

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)

Lists some reasons why the vast resource potential of entomology remains largely untapped by teachers of general biology. (LS)

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

Describes an undergraduate experiment that illustrates the use of thin-layer chromatography. (MLH)

Using mirrors mounted on a plywood base to study reflections provides an introduction to the study of transformation. (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)