Describes the use of plastic bottles in making science models and displays, including wall displays of leaf structure and function, model teeth, and a model villus. (WRM)

Describes a study of the effectiveness of using role-play in teaching the functions of the kidney to secondary science students. Results suggest that the teaching technique is effective. (Author/WRM)

Describes the use of disc or ring magnets magetized axially and iron discs, in conjunction with an overhead projector, as a model of nuclear structure and of complete molecules. (GS)

Questions the approach used to the topic of energy in Nuffield Secondary Science. Indicates that 14-year-old children will not be able to generalize from the experiments to see a pattern energing, and the concept of energy involves understanding of other concepts that the children have not yet attained. (GS)

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)

Discusses a two-year assessment undertaken to evaluate the Nuffield A-Level chemistry course. Secondary teachers selected chemistry experiments for assessment purposes and assessed their students in manipulative skills, observational skills, interpretation skills, creative skills, and attitudes. (MLH)

Outlines safe laboratory procedures for the handling of micro-organisms including aseptic technique, manipulation of cultures, and treatment of contaminated equipment. Identifies the principal hazard as the microbial aerosol, explains its possible effects, and describes the appropriate precautions. (GS)

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)

Presents an analysis of the conceptual demands of Nuffield O-level biology, outlines the teaching strategy of the course, describes the population for whom the course is suited, and relates possible instructional modifications for those pupils not ideally suited for the course. (GS)