Outlines the ecology of Lasius flavus ant hill, describes sampling techniques for the determination of the species composition of the surrounding vegetation, presents a table of typical results from an ant-hill practical, and lists suggestions for further experiments. (GS)

Describes an attempt to plot the walking speeds of crowds as a Maxwellian velocity distribution in one dimension, analagous to an ideal gas approximation. (CP)

Describes a three day activity in which students divide into groups, each group arguing for the construction of a power plant using coal, oil or nuclear energy. (CP)

Explains a technique to create animated films for aid in the instruction of relativistic mechanics through the use of a computer. (CP)

Utilizes the computer for analysis of the indices of refraction of several liquids in the PSSC refraction lab. (CP)

Details a method of taking short interval photography with inexpensive equipment. (CP)

Provides students with an experience in drawing conclusions from experimental data. Large scale scattering experiment is used. (CP)

Stresses the importance of effective visual aids in physics instructions and the creation of motion pictures through animation. (CP)

A secondary geology class used Eratosthenes' method for measuring the circumference of the earth by comparing their measurements of the shadow of a vertical rod to the measurements made by another person contacted by ham radio. (MLH)

Summarized from a 1972 survey are instructional materials used in more than 1,000 British special education schools. (CL)

Describes an experiment in which the rate of reaction can be followed using a colorimeter and data can be used to determine order of reaction, rate constant, and energy of activation. (GS)

Two instruments are described which were designed to provide beginning students with the tools for determining sun-time and the altitude of the sun. Both can be constructed by the student. A simple-to-construct scale is included. Activities are suggested to use with the instruments. (Author/EB)