Described is a simple demonstration that relates the techniques of magnetic resonance imaging (MRI) used in medicine and nuclear magnetic resonance (NMR) spectroscopy. Included are materials, procedures, and probable results. (KR)

Described is a demonstration that provides an introduction to nonequilibrium reaction-diffusion systems and the coupling of hydrodynamics to chemical reactions. Experiments that demonstrate autocatalytic behavior that are effected by gravity and convection are included. (KR)

Presented is a method for demonstrating the use of various fractionating columns to resolve mixtures into individual components and to correlate the resolving powers of column packings to their "hold-up" volumes. Fractions were analyzed using refractive indices. (KR)

Provides anecdotal information about the Science Learning Center and demonstrates how an academic support system for the natural sciences can promote a positive learning milieu, reduce science anxiety, and furnish additional learning modalities. (PR)

Presents historical background and modern explanations for the popular demonstration of showing conductivity of solutions through the insertion of a light-bulb conductivity tester into deionized water and water with salt in it. (PR)

Describes how one teacher and 46 general chemistry students used portfolios as part of the evaluative process. Argues that any worthwhile assessment must address questions about the inevitable impact of testing on students and their learning. (PR)

Describes an experiment where students test the furcula or wishbone of a bird for its springlike properties. (PR)

Describes a demonstration using a variety of clear solutions in which the instructor asks students whether the solutions appear homogeneous or inadequately mixed. The solutions are then induced to fluoresce with ultraviolet light to provide visible evidence of homogeneity or nonhomogeneity. (PR)

Describes successes achieved in the use of active video techniques and discusses their potential contributions to science education on a national scale. (PR)

Describes the existing educational structure in Brazil dedicated to the training of engineers and engineering technologists. (PR)

This laboratory provides an easy and rapid way to introduce students to some of the exciting principles of gene regulation by analyzing expression of the lac operon of Escherichia coli. (PR)

Describes procedures for identifying the protein ribonuclease from plant tissue extracts using mini-gel electrophoresis. (PR)

Describes a simulation exercise involving an imaginary organism in which students study the effect of predation on allele frequencies, examine the assumptions of the Hardy-Weinberg law, and consider whether the need to survive is a guiding force in evolution. Includes instruction for conducting the exercise. (MDH)

Describes the importance of the psychological factors of motivation, learned helplessness, and self-esteem in learning at the community college level. (PR)

Provides insights for college-level teachers beginning their tasks of directing student research. (PR)