A model of twin octahedrons having a common line which is useful for teaching stereochemistry (especially that of complex ions) can be made easily by using a sealed, empty envelope. The steps necessary to accomplish this task are presented. (JN)

A model of a cube which is necessary for teaching stereochemistry (especially of inorganic compounds) can be made easily, by using a sealed, empty envelope. The steps necessary to accomplish this task are presented. (JN)

A model of a trigonal prism which is useful for teaching stereochemistry (especially of the neodymium enneahydrate ion), can be made easily by using a sealed, empty envelope. The steps necessary to accomplish this task are presented. (JN)

A model of a square antiprism which is necessary for teaching stereochemistry (for example, of the octafluorotantalate ion) can be made easily by using a sealed, empty envelope. The steps necessary to accomplish this task are presented. (JN)

A model of a dodecahedron which is necessary for teaching stereochemistry (for example, that of dodecahedrane) can be made easily by using a sealed, empty envelope. The steps necessary for accomplishing this task are presented. (JN)

Outlines a problem-solving method for beginning chemistry students that utilizes specific, concrete steps as well as computer-assisted tutorials. The method involves an approach referred to as the Factor-Unit Method coupled with a graphical "road map" which allows students to trace problems from start to finish. (JN)

Examines the treatment of errors and significant figures in physics manuals as part of an evaluation of these instructional materials. Comments on specific materials reviewed are provided. (JN)

The tendency of a poured liquid to cling to the outside of a container is known as the "teapot effect." The nature of the teapot effect and experiments investigating this phenomenon are described. (JN)

Examined job specifications found in advertisements in "The Times Educational Supplement." Results indicate that in a large number of cases information supplied was inadequate. In addition, many advertisements did not indicate the academic specialty required (biology, chemistry, physics) of potential candidates. (JN)

Suggests that many textbooks intended as standard A-level texts contain accounts of DNA synthesis which are out of date, and in some cases, contain unhelpful or misleading simplifications. An outline of recommended materials and guidelines on how recent advances aid the understanding of this process are presented. (Author/JN)

Describes how the interrelation of the potato beetle, the buffalo-bur, and the potato is used as an introduction to ecology. Methods of controlling the beetle and ecological principles illustrated in the interrelationship are discussed. (JN)

Discusses teacher characteristics, student characteristics, curriculum development, and instructional methods related to secondary science education in West Germany. (MLH)

Supplies the names of British publications that contain chemistry questions, most of them at the high school level. (MLH)

Described is a method of demonstrating the vibrations of a string, utilizing an overhead projector. (SL)

Outlines the approach of a British educational committee to draft proposals for a secondary chemistry syllabus at the N and F levels. (MLH)