Investigates the manner and the degree to which science teachers consider the nature of the subject matter in their decision making when they plan and deliver instructional tasks. Considerations for student development, curriculum guide objectives, and pressures of accountability dominated decision making. (Author/YP)

Described is a study of 147 students that indicated a high proportion of students did not understand the concept of limiting factors. Textbook presentations that create problems are discussed. Strategies which may be more effective in teaching the concept are suggested. (CW)

Describes making a cardboard frog. Discusses the physics of various motions of the frog. Provides diagrams showing how to make the frog, the motions, and the mechanics formulas. (YP)

Discussed is the twentieth anniversary of Cornell's program on science, technology, and society (STS); one of the country's largest and most influential. Described is the current status of STS programs around the country. Surveys social problems affecting STS areas. (MVL)

Reviews three software programs: (1) "Microsoft Works 2.0": word processing, data processing, and telecommunications, grades 7 and up; (2) "AppleWorks GS": word processor, database, spreadsheet, graphics, and telecommunications, grades 3-12, Apple IIGS; (3) "Choices, Choices: On the Playground, Taking Responsibility":…

Describes the use of the polygenic trait of total fingerprint ridge count in the classroom as a laboratory investigation. Presents information on background of topic, fingerprint patterns which are classified into three major groups, ridge count, the inheritance model, and activities. Includes an example data sheet format for fingerprints. (RT)

Points out a different and much simpler approach for the study of equilibria of multiple and heterogeneous chemical reactions. A simulation on coal methanation is used to teach the technique. An example and the methodology used are provided. (MVL)

A course where students were required to choose projects and provide studies of the feasibility, consumer need, and process design is discussed. Other projects such as advertising campaigns used to encourage student creativity are discussed. The need to keep second semester seniors interested is stressed. (MVL)

Discusses the mechanism and the change of pH during the reaction. Notes that a dramatic rise in pH occurs when the reaction nears completion. Evaluates theories by other authors. (MVL)

Gives upper level chemistry students a better understanding of the application of lasers in the field of spectroscopy. Provides three experiments to demonstrate the thermal lens effect: determination of beam profile, cell position optimization, and pKa determination. (MVL)

Describes an interdisciplinary approach to science learning in settings usually associated with the humanities or social sciences. Explains the program, its rewards and results, the self and identity seminar, why the program works, and ways of adapting the program. (RT)

Discusses aspects of using anecdotes in the classroom including vividness, the downside, high inferential risks, and low inferential risks. Reviews research underpinnings. (MVL)

Explains a lesson in which the scientific method is used as a teaching strategy. Discusses when this approach can be used, the interdisciplinary method, and sample science concepts that can be appropriately taught this way. (RT)

Explains the development of a science program which was initiated to help students, parents, and other teachers appreciate science. Provides a list of materials needed, procedures, questions, and objectives for performing two of the 30 activities used in the project. (RT)

Explains a state standardized science program evaluation system that includes hands-on activities. Explains the syllabus, workshops, purpose of test, test features and its component parts including sample questions. (RT)