Describes how a planetarium was constructed on the ceiling of a traditional physics laboratory. Similarities and differences between the "poor man's" planetarium and other planetariums are noted. (JN)

Discusses a laboratory exercise (suitable for the day before spring vacation) involving use of a hard-boiled egg to stimulate student responses to questions on the effect of adding salt to the water, formation of iron sulfide, ease of peeling, and gas laws. Additional experiments are included. (BC)

The separation of lead and bismuth by chelate solvent extraction is of interest because of the simplicity which the use of radiotracers allows in its demonstration. Theoretical background information, procedures, materials needed, and typical results are provided for an experiment involving the extraction. (JN)

Describes a procedurally quick, simple, and inexpensive experiment which illustrates the magnitude and some effects of solvent-ion interactions in aqueous solutions. Theoretical information, procedures, and examples of temperature, volume and hydration number calculations are provided. (JN)

Describes an undergraduate physical chemistry experiment in phase equilibria which equilibrates potassium iodide solutions of known concentration with solid iodine. (MLH)

A number of classroom aids are described and sources given. Included are microscopes, films, minicomputers, balances, catalogs, and information bulletins. (RH)

Discusses the designs for an inexpensive table for analytical balances, a safety pipet for reagents, and permanent models for determining absolute configurations. (MLH)

Describes a procedure for studying the kinetics of the second-order hydrolysis of ethylene bromohydrine in alkaline medium by incorporating a substance that changes color as one of the reacting components is depleted. (MLH)

Describes a laboratory experiment that utilizes NMR Spectroscopy to determine the rate constant for the C-N bond rotation in dimethylacetamide. (MLH)

This paper provides psychological and sociological substance to Kurt Lewin's conceptions of topological territories. (Author/AM)

Describes a physics experiment in single and multiple slit diffraction and interference phenomena that illustrates the existence of diffraction gratings in many common objects. (MLH)

This paper discusses the Ed.D. and the Ph.D. in Education degrees. Both degrees socialize students into a profession based in service, that enjoys autonomy, and that is grounded in a knowledge base. However, the Ed.D. prepares administrators for professional practice through a practical curriculum, and the Ph.D. concentrates on training faculty…

The purpose of this study was to investigate Korean high school students' perceptions of their laboratory classrooms, focusing especially on the aspects measured by the items in the Science Laboratory Environment Inventory (SLEI). The study involved 439 high school students from three different streams (145 from the humanities stream, 195 from the…

Every spring there is a great exodus: graduating consultants depart from the writing lab, taking with them semesters and semesters of experience, and leaving a gap in the ranks of the staff. This paper discusses a way lab directors can learn from them: departing consultants wrote short essays entitled "Advice to the Future" which…