Introduces a demonstration kit for understanding conductivity by using several fruits and vegetables. Provides a parts list and assembly instructions for the "lemon screamer." (YP)

Introduces a construction method for a bubble made of polyurethane plastic and its applications in an ecology classroom. Provides the materials list, directions for bubble construction, and classroom activities. (YP)

Describes computer use in the undergraduate physics laboratory at the University of Toronto. Topics discussed include user interfaces; local area networking; data analysis and acquisition; other computer applications, including a programmable calculator and word processing; and an example of an experiment involving gravity. (LRW)

Discusses the advantages of Xenopus laevis as an experimental animal in the study of embryogenesis in vertebrates. Summarizes the contributions of this system to the analysis of ribosomal and 5S RNA genes, and the diverse and highly productive applications of the oocyte injection technology. (RT)

Discusses advantages of nematode use for studying patterns of cell division, differentiation, and morphogenesis. Describes nematode development. Cites experimental approaches available for genetic studies. Reviews the topics of control of cell division and differentiation, the nervous system, and muscle assembly and function of the organism. (RT)

Describes a project that can be used to encourage intellectual independence in students and teach them some of the inquiry procedures used in scientific research. Discusses procedures, safety precautions, and sample results. (CW)

Outlines the genetic elements found in the bacterial cell which play a role in recombining DNA sequences. Provides a core structure to which the mechanisms occurring in and between bacterial cells can be related. Discusses the practicalities of recombinant DNA techniques. (Author/CW)

Describes a series of microcomputer-based laboratory exercises that are designed to assist undergraduate students in acquiring basic psychological concepts in memory retention. Mnemonics used in the exercises are explained, and computer-generated tabular and graphic displays designed for use in classroom demonstrations are described. (Author/LRW)

Describes simple, efficient techniques for treating hazardous chemicals so that nontoxic and nonhazardous residues are formed. Discusses general rules for management of waste chemicals from school laboratories and general techniques for the disposal of waste or surplus chemicals. Lists specific disposal reactions. (CW)

Deals with a fungus that plays an important role in the forests of Asia as a decomposer of recently dead trees and in agriculture as an important edible mushroom. Describes how to culture these mushrooms including materials, conditions, and troubleshooting. Gives ideas for classroom activities. (CW)

Details three demonstrations for use in chemistry classrooms. Includes: "A Demonstration of Corrosion by Differential Aeration"; "A Simple Demonstration of the Activation Energy Concept"; and "A Boiling Demonstration at Room Temperature." Each description includes equipment, materials, and methods. (CW)

Describes the "Grow Lab" program which is sponsored by the National Gardening Association. Discusses how eight square feet of classroom space are converted into a mini-ecosystem. Mentions the development of a curriculum guide to accompany the indoor garden. (TW)

Describes a data acquisition system developed for an undergraduate engineering students' instructional laboratory at Georgia Tech. Special emphasis is placed on the design of an A/D Converter Board used to measure the viscosity and temperature of motor oil. The Simons' BASIC Program Listing for the Commodore 64 microcomputer is appended. (LRW)

Reviews a book that presents a method for teaching writing supported by theory, and that is illustrated with examples of students' and teachers' writings. The authors' methods are based on four propositions drawn from their command of modern discourse theory, philosophy, and linguistics. (NKA)

Provides guidelines and practical advice for planning and running a computer lab for writing. (NKA)