Presented is a method of constructing a wide variety of molecular models from inexpensive, durable materials. Equipment, supplies, atomic sizes, bond lengths and bond angles, assembly, and painting are discussed. (CW)

Proposes an approach to school laboratory experiences which leads to gradual acquisition of inquiry skills based on the idea of advance organizers. Presents a design which is context familiar and can serve as an introduction to scientific inquiry. Discusses student achievement, and teacher and student attitudes. (CW)

Presents four Physics General Certificate of Secondary Education assessment practicals which can be photocopied for use in instruction. Includes notes for guidance of teachers in determining student skills in management and organization, designing and carrying out experiments to solve problems, draw conclusions, and select suitable apparatus for…

Describes two oscillating reactions: the Briggs-Raucher reaction using H202, KIO3, malonic acid, and MnSO4 which changes from yellow to blue, and the Belousov-Zhabotinskii reaction uses NaBrO3, NaBr, malonic acid, and ferroin solution and changes from red to blue. Includes a third color demonstration on the six oxidation states of manganese. (MVL)

Describes the methods and materials used to obtain satellite pictures from weather satellites. Discusses possible physics lessons which can be done using this equipment including orbital mechanics, and how the satellite works. (CW)

The production of science textbooks and the processes whereby both producers and consumers can work to improve them are described. Included are discussions of selection at the state level and a publishers perspective, and six textbook experiments at different levels from different publishers. (CW)

To avoid a tedious task for recording temperature, a computer was used for calculating the heat of crystallization for the compound sodium thiosulfate. Described are the computer-interfacing procedures. Provides pictures of laboratory equipment and typical graphs from experiments. (YP)

An approach to teaching the properties of the elements and their arrangement in the periodic table is suggested. Discussed are symbols for the elements, format of the table, and coding the properties of the elements on the table. (CW)

A brief history of several of the early forms of the periodic table of the elements are discussed including those of Mendeleev, Meyer, Hubbard, Gmelin, Von Antropoff, and Strong. A more every-day-life form of the table is presented. (CW)

Reviewed is a television-based course available on videotape, "The World of Chemistry," which includes 26 programs. Discussed are the content, the sponsorship of the program, format, availability, and reviewer comments. (CW)

A review of some of the different forms that biological ethics have taken in the past and of issues which are arising suggests that ethics should be taught as a part of biological education within a framework of history, futures study, training in clear thinking, and the development of empathy. (Author/CW)

Instructions are given for constructing two models, one to illustrate the general principles of symmetry in T=1, T=3, and T=4 viruses, and the other to illustrate the disposition of protein subunits in the T=3 plant viruses and the picornaviruses. (Author/CW)

Described are the use of two different tests designed to test for selected inquiry skills. Procedures, tests used, and results in several different countries are presented. Implications for classroom instruction are discussed. (CW)

Presented is an activity designed to raise energy awareness, teach electricity conservation, and show students how to carry out a science project. Included are objectives, a list of materials, procedures, student information sheets on meter reading, sample charts and graphs, and a sample awards certificate. (CW)

Presented is an illustration of the use of a computer spreadsheet program, Microsoft Excel version 1.5, for solving complicated chemical problems. Examples of spreadsheet output are provided. (CW)