Reviews identified learning problems dealing with stoichiometric calculations. Suggests solutions to these problems along with consequences for the curriculum. Includes remarks from a mathematics teacher concerning these problems. (DS)

Discusses the missing water on Mars. Describes five experiments simulating conditions on Mars: (1) behavior of dry ice; (2) low-pressure vacuum; (3) freezing point depression; (4) water in hydrated minerals and clay; and (5) properties of carbon dioxide. (YP)

Provides background information for teachers on the chemistry of flourine. Points out that it links aerosols with refrigerants, anaesthetics with fire-fighting agents, batteries with blood substitutes, and atomic energy with the steel, petroleum, and aluminum industries. (JN)

The goal in the development of this Arizona standard was to assure that the six strands and five unifying concepts are interwoven into a fabric of science that represents the true nature of science. Students have the opportunity to develop both the skills and content knowledge necessary to be scientifically literate members of the community.…

Reported is an analysis to determine the real costs of undergraduate student projects and to highlight areas in which economies could be made or efficiency improved. (PB)

The 21st century's information economy is creating more jobs that require not only a college education but also at least some expertise in the fields of science, technology, engineering and math, collectively known as STEM. Across the country, schools and communities are finding that the hours after school are particularly conducive to…

A history of the search for the structure of DNA, as revealed in the evolution of biochemistry and genetics textbooks, reveals that they are unacceptably tardy in presenting the current (or even the recent) state of knowledge. This problem places an extra burden on biology teachers to supplement these texts.

A homemade device for testing particle scattering is described. Also described are experiments in zero gravity conducted in free fall in the cargo space of an airplane belonging to the National Aeronautics and Space Administration. (JN)

National Science Teachers Association has cited 50 science education programs as national exemplars in the 1982 Search for Excellence in Science Education. Programs are listed under these headings: elementary science, biology, physical science, science/technology/society, and inquiry. (Author/JN)

Develops a teaching scheme for 11-13 year-olds based on different types of investigational practical work. Includes discussion of difficulties in investigations, four types of investigations, and deployment in the curriculum. (YP)

The National Research Council is coordinating the development of national standards for science education in grades K through 12. By the fall of 1994, National Science Education Standards will be completed and published. The standards will contain narrative descriptions of what all students should be able to do to engage and understand the natural…

Examines current philosophies and approaches to science instruction. Offers parameters for consideration in making science courses more relevant to industry, technology, and society. Contrasts two approaches to science education. (ML)

Addresses the principles and problems associated with the use of significant figures. Explains uncertainty, the meaning of significant figures, the Simple Rule, the Three Rule, and the 1-5 Rule. Also provides examples of the Rules. (ML)

Examines the causes that delayed the growth of modern science in China, tracing the historical development of Sino-Western physics. Also evaluates the influence of ideologies and politico-social institutions on the origin and direction of science and physics in China. (ML)

Discusses the physics behind making ice cream in a hand-cranked ice cream maker. Ingredients in the maker are cooled and hardened by a bath of ice, water, and rock salt. Several experiments to investigate the variables involved in preparing the ice cream (and related desserts) are included. (JN)