A small pond in a schoolyard provided year-round biological activities for children. As seasons changed, concepts and life relations also changed. Besides microscopic organisms in water, children learned about microscopic algae, detritus, and food chains. Concepts of predator-prey relationships and of ecosystems were successfully developed. (PS)

A new method of copper analysis is presented which is more reliable, when used by students, than the IUPAC recommended spectral method, and the electrode is suitable for the copper assay of mains tap water, soft drinks, urine, and blood. (DF)

Sets forth guidelines for students interested in doing research. Includes requirements for the research projects, steps in project work, style and format for the report, and a list of references. (DF)

An experiment in which both Raman-Nath and Bragg diffraction of light by acoustic waves in water are observed in the sound frequency range from 5 to 45 MHz. The apparatus consists of a laser, light detector, rf power source, quartz transducer, and homemade water cell. (Author/DF)

Indicated are general guidelines for using material generally available, and some facts are presented about the history, life styles, and social structure of California Indian peoples. A bibliography suggests useful resources which should be at the disposal of teachers and included in school libraries. (JB)

An experiment involving the preservation of mouse kidney cortex and liver tissues is set up to evaluate the relative tonicity of fixatives. (DF)

The author provides dialogue: to define science; to show scientific combinations; to distinguish between projects that are science and those that are not; and to consider the justification for continuing scientific research. (DF)

The potential of the computer usage in instruction is discussed. A project was initiated to identify areas where the computer might yield significant advances in teaching. (DF)