Describes the use of a puzzle to reinforce knowledge of how things grow and outlines the use of the house cricket as an alternative to the locust or cockroach in school biology. (Author/GS)

Describes a method for the determination of the velocity of sound using a dual oscilloscope on which is displayed the sinusoidal input into a loudspeaker and the signal picked up by a microphone. (GS)

Describes the magnetic field of Helmholtz coils qualitatively and then provides the basis for a quantitative expression. Since the mathematical calculations are very involved, a computer program for solving the mathematical expression is presented and explained. (GS)

Describes a demonstration which illustrates the diffusion of gases across a membrane. (GS)

Presents a flowchart that is used in the elementary qualitative analysis of a single salt. (GS)

Presents the use of quantity calculus in calculations arising in volumetric analysis and in the more general field of chemical stoichiometrics. (HM)

Reviews articles and papers published in 1975 relating to chemistry and presents a number of chemistry experiments, demonstrations,and activities. (SL)

Describes a technique for isolating slime molds from tree bark and outlines projects for working with slime molds in the laboratory. Diagrams of 26 of the more common British species and a key to the Orders of Myxomcetes are given. (CS)

Reviews basic information on the Chemistry of strontium and its compounds. Explains biological aspects of strontium and its pharmaceutical applications. Highlights industrial application of strontium and its components. (ML)

Summarized is a study designed to indicate how secondary school science teachers in Great Britain choose and use industrially produced resource materials (IPRM). Among the types of IPRM considered are films, videos, and computer simulations. Suggestions are given for improving materials for schools. (RH)

This section of the journal includes several short notes on science activities and materials for secondary schools. Activities and materials are included that relate to biology, microbiology, microcomputers, chemistry, and physics. (RH)

Discusses various activities using a ripple tank. Offers practical suggestions (not mentioned in standard textbooks) for achieving a clear, steady quality of waves with the instrument. (JN)

Discusses the development and use of flowcharts to involve students in the major stages of experimental design and hypothesizing. The progress of stages attempts to simplify the complexity involved during problem-solving in science investigations. Several illustrative flowcharts are included. (JN)

Discusses the difficulty of explaining the concept of entropy, and provides exercises, experiments, and discussions concerning entropy. (MLH)