Presented is a brief history of manufacturing chocolate and an outline of production methods. Describes laboratory techniques used to monitor liquid chocolate viscosity. Discusses a simple experiment which can be performed in the classroom. (Author/CW)

Proposes that science teaching be based upon experimental work of the students, but most Italian schools are not equipped for this. This implies the development of inexpensive kits and syllabuses which can realistically be used in the schools. Provides one example of a suitable kit for individual experiments on electricity and magnetism. (GS)

Describes how to construct an isothermal calorimeter and lists typical results of a displacement reaction using zinc. (LS)

Describes an experiment that results in the construction of an ecological pyramid with three tropic levels. (GS)

Describes an experiment that generates data for calculating the ratio of molecular separation in a gas to molecular diameter. (GS)

Describes the difficulties that arise from teaching science to mixed ability groups where individualized instruction is emphasized. (BR)

Explains some of the ways in which dried yeast has been used in sixth-form work to illustrate some points and principles relevant to a high school biology course. (Author/GA)

Provides a reading list of articles and journals for high school biology on a wide range of topics. A few short articles and experiments on biology related topics are also given. (GA)

Presents activities and experiments that can be performed with mirrors to illustrate the nature and behavior of light. Includes diagrams, directives and investigative questions. (ML)

Contains a reading list of articles published in 1985 covering 14 biological topics. Includes descriptions, procedures, and references for 26 experiments. These investigations deal with selected concepts in biology, ecology, chemistry, and physics and include computer-based instruction. (ML)

Describes activities, games, experiments, demonstrations, and computer-oriented exercises in all science areas. Topics include energy flow through a marine ecosystem, using 2,4-dichlorophenoxyethanoic acid to demonstrate translocation in plants, use of the dichotomous key, use of leaf yeasts to monitor atmospheric pollution, and others. (JN)

Gives a detailed description of the constructon of equipment needed for redox equilibria experiments and the measurement of the electromotive force of voltaic cells. This information is provided to solve the problem of inadequate, expensive equipment required for A-level chemistry practical work. (JN)