Tests the hypothesis that the effectiveness of discriminative stimuli as reinforcers is a function of the magnitude of the difference between them. (Author/RK)

Describes a management plan for thirty individualized learning studios in the general music class. (Editor/RK)

This article outlines the linguistic, technological, and methodological criteria for language laboratory use as specified by CILA (Swiss Interuniversity Commission for Applied Linguistics). (Text is in French.) (CDSH/CLK)

Describes an experiment that illustrates the following points concerning the experimental determination of trypsin activity: (1) there is a difference in basing enzyme concentration on weight, absorbance, or active sites; and (2) the method of expressing enzyme concentration determines the value of specific, molecular, and catalytic center…

Describes an experiment in which the technique of ph-controlled extractive separation is used to separate a mixture of drugs aspirin (acidic), caffeine (basic), and phenacetin (neutral). (MLH)

Describes an advanced undergraduate materials science course in which each student conducts two independent laboratory projects and is required to submit a formal lab report at the end of each project. (MLH)

Described is a physics experiment which investigates the reactions occurring when a hot dog is fried or broiled. (SL)

Described are three new biological science laboratory products including: a bench-top incubator shaker, a Lindburg lab tube furnace, and a carbon dioxide incubator. (SL)

Describes three experiments illustrating some technological applications of liquid crystal substances, which are currently used to display numbers and letters by scattering of ambient light. (MLH)

Discusses the planning and organization of an instrumental analysis course for chemistry majors designed to acquaint the students with an appreciation of the variety of ways available for a given analysis. Describes grading procedures and the use of taped lectures. (MLH)

Describes an inexpensive apparatus that can be constructed from ordinary laboratory materials that will convert precoated thin layer chromatography plates into channeled plates. (MLH)

Suggests a study of plant dyes as a way of stimulating student interest and enthusiasm; provides an example of a student report on this subject. (GS)

Explains the separation of the constituents of mixtures on one piece of chromatography paper. The example presented involves a vitamin C tablet, a disprin tablet, and a glucose tablet. Outlined are two methods for separating the constituents. (GS)

An educator at Bryant College (Rhode Island), a business-oriented college, sought to better understand the effects of gender as they operate within and through the school's writing center. Bryant College's female students attend a college with a student body of about 40% females and 60% males. The hypothesis in a study was that female students…

National Science Teachers Association (NSTA), led by a panel of K-12 science teachers, has developed a new position statement, "Responsible Use of Live Animals and Dissection in the Science Classroom." This statement examines the issues surrounding the integration of animals into the K-12 science curriculum and highlights key…