Discusses uses of programmable pocket electronic calculators in the secondary level classroom. Uses discussed include: grading, laboratory, exercises, computing T-scores, and a quantitative approach to chemical equilibrium. (SL)

Describes six commercially available toys useful in demonstrating various chemical principles in the secondary school classroom. (SL)

Presents the third of a four part article interviewing award winning secondary level physics teachers. Discussed are their teaching methods and techniques, and the courses they teach. (SL)

Reports results of a New York state survey of secondary physics teachers concerning trends in physics enrollment and teacher opinion concerning enrollment changes. Only 11 percent of the survey questionnaires were returned; however, the major positive factor related to enrollment was active recruitment of students and the major negative factor was…

Described are nine enzyme essays for distinguishing soil samples. Colorimetric methods are used to compare enzyme levels in soils from different sites. Each soil tested had its own spectrum of activity. Attention is drawn to applications of this technique in forensic science and in studies of soil fertility. (Author/AJ)

Biological examinations given to 16-18 year olds were analyzed over an eight year period for the number and type of mathematical questions. There was an increase in the number of questions which included skills in graphing, rate, percentage, and statistics. Difficulties with graphs, calculations and indices are discussed. (AJ)

A sample run of a program intended for use by students with access to a teletype or visual display computer is shown. The program is satisfactory for the testing of the law for up to about 20 generations using any valid set of frequencies for genotypes. (AJ)

Discusses the importance of the mole concept in teaching elementary chemical theory. (SL)

Discussed is one teacher's method of teaching students to use various marine and scientific apparati while studying important relationships within the ecosystem. A data retrieval chart is included with questions and problems to ask about the data, along with information on how to interpret the data chart. (MA)

In this insect morphology exercise, students study the external anatomy of the worker honeybee. The structures listed and illustrated are discussed in relation to their functions. A goal of the exercise is to establish the bee as a well-adapted, social insect. (MA)

Provides background information about the planet Pluto. Includes the history of Pluto and discusses some of the common misconceptions about the planets. Addresses some of the recent discoveries about Pluto and contains a resource list of books, articles, and a videotape. (TW)

Described is the laboratory program for a second-year chemistry class at a Wisconsin high school. The laboratory stresses student-designed labs. Examples of topics considered are included. (RH)

Presented are the materials and a procedure for demonstrating the levitation of a magnet above a superconducting material. The demonstration can be projected with an overhead projector for a large group of students. Kits to simplify the demonstration can be purchased from the Institute for Chemical Education of the University of Wisconsin-Madison.…

This experiment/demonstration provides elementary through high school science students with hands-on experience with polymer entropy. Construction of a simple machine for converting light into mechanical energy is described. (RH)

Included are demonstrations that illustrate (1) the chemistry of air pollution, (2) combustion and explosion, and (3) various properties of liquids. (RH)