Presents the plans for constructing a mode 2 TOPS Projector-adaptor, which costs one-half that of a model described in an earlier article. The author uses a step-by-step approach to the project. (SA)

Describes differences between engineers' and physicists' views of free-body diagrams (FBD). (PR)

Discusses some of the problems associated with teaching abstract concepts in biochemistry because of the inability to provide visual aids. Suggests the use of metabolonograms as analogies in teaching certain concepts. (TW)

This paper describes a collection of novel ideas for bulletin board displays that would be useful in supplementing science classroom instruction. Information on women and minorities in science; science concepts in everyday activities such as nutrition, baseball, and ice cream-making; and various holidays and celebratory events is included. Each…

The teaching of science demands the regular use of diagrams and sketches which may be formal or informal. This document outlines some basic guidelines, principles, and suggestions for preparing these diagrams. Topics covered include: basic drawing, shapes, lines and angles, contrast and shading, and lettering. (JRH)

Considers carbon-carbon multiple bonds in terms of Pauling's bent bond model, which allows direct calculation of double and triple bonds from the length of a CC single bond. Lengths of these multiple bonds are estimated from direct measurements on "bent-bond" models constructed of plastic tubing and standard kits. (CS)

Describes the use of cassette tape recordings in preparing freshman chemistry students for experiments in laboratories. The tapes are said to have decreased student anxiety in the laboratory and increased laboratory skills. (SA)

Explores the use of the poster as a form of scientific communication, and its relationship to the published paper, the abstract, and the oral communication. Suggestions for size, format, and layout for posters are presented. Reviews of two booklets on posters are printed at the end of this article. (TW)

Differing treatments of graphs in mathematics and science are discussed. A teaching sequence to develop contrasts between real and ideal data is suggested. (MP)

This article is a reproducible page for students in grades four through six. The stated objective is the student will organize information about unfamiliar animals and infer other information. Students read clues about five newly discovered species and use a chart to organize this information in a more meaningful way. (PR)

A description of an apparatus for demonstrating the trajectory of a charged particle, is given. A photograph of the equipment used in the demonstrations accompanies the text. (SA)

Presents a didactic model to improve the teaching/learning process in the representation of Lewis structures. Places special emphasis on the calculation and reduction of formal charges, and in the representation of molecules in which the central atom has expanded its valence shell. (MVL)

Discusses the need for visual aids in helping students recognize various minerals in a thin section. Describes the development of a manual of color photomicrographs designed to provide students with a more realistic view of minerals than can be provided by charts and diagrams. (TW)

Discusses the use of a strip log as a diagrammatic representation of the information available in a sequence of sedimentary rocks. Describes the design of the strip log (both symbolically and by visual/spatial patterns) and some of the possible interpretations that can be made using them. (TW)