Describes a procedure useful for investigating the effects of substances on plant growth and development. A bean seedling's stem is partially split, and each half is placed in a different nutrient solution. Suggestions for the instructional use of the technique are made. (AL)

Uses discarded light bulbs to make balanced aquaria. (AL)

Describes activities dealing with the surface tension of water designed to capture interest and raise questions in students. (BR)

Suggests methods of teaching principles of geological inference by observation of sidewalks, parking lots, school grounds, and vacant lots. (AL)

Urges the use of the immediate environment of the school to serve as a focus and a medium to help plan activities and experiments in the different subject areas of science, and in the area of environment. (GA)

A five-week introductory unit on electricity, structured in a historical perspective provided by the letters of Ben Franklin, is described. (CP)

The laboratory approach to science and mathematics is described as a refreshing change for both teacher and students. Suggestions are given for planning a laboratory-based program. Guidelines for teachers of both handicapped and non handicapped are included. A school for handicapped children in Minneapolis is described. (EB)

Provides a series of learning center activities which demonstrate concepts about air. (CP)

An instrument which affords blind students opportunities for direct observation, experimentation, and discovery is described. Accompanying the light sensor is a manual containing 25 experiments. (EB)

Describes the positive response to and the success of a course, called "Science in Action," that was offered to elementary school children on Saturdays, and took place in college laboratories of physical science and biology. (GA)

A laboratory study is detailed utilizing the skills of hypothesizing, designing experiments, and controlling variables. (EB)