Describes construction and use of a simple home-built device, using an overhead projector, for use in demonstrations of the addition of various combinations of red, green, and blue light. Useful in connection with discussions of color, color vision, or color television. (JRH)

Liquid crystal displays are currently utilized to convey information via graphic displays. Presents experiments and explanations that employ the concept of liquid crystals to learn concepts related to the various states of matter, electric and magnetic forces, refraction of light, and optics. Discusses applications of liquid crystal technology.…

Discusses 27 chemical demonstrations involving inexpensive, readily available materials that illustrate the following concepts: acid/base properties, gas properties, characteristics of carbon dioxide, chemiluminescence, freezing point depression, heat of vaporization; density, polymers, surface tension, polarity/nonpolarity, UV absorption,…

Describes a college course that provides a challenging learning experience in science based upon famous experiments and observations dating from the time of Aristotle to the present day. Presents information concerning (1) the course organization, structure, laboratory development, and expectations; (2) course content by quarter; (3) evaluation of…

Utilizes vector mathematics to explain the reflective properties of a corner cube retroreflector, consisting of three plane mirrors assembled at right angles with a common vertex. Analyzes the useful property that an incident beam of light at any point in this reflector will return on a parallel path. (MDH)

Some of the projects designed to increase girls' uptake of physics are surveyed and some aspects of teaching physics in a girl-friendly way are presented. Possible reasons for the underrepresentation of girls in high school physics are discussed. The Girls into Science and Technology (GIST) and the Girls' Education in Mathematics, Science and…

French tenth grade physics classes were observed as they studied electric circuits over a one-year period. An analysis is presented of tests taken during the year. The main point separating "average" students from "good" ones is their performances in "implicitly difficult exercises," that is, in what appears…

The verbal interactions among pupils engaged in problem-solving tasks were studied in an attempt to explore the effectiveness of small-group learning in science. Interactions were predominantly task related, but their content rarely rose above the level of "factual information" interchange. Information exchange at higher cognitive levels…

Discussion of mathematical modeling, particularly for high school physics curricula, focuses on software that is connected with laboratory work and the inference of mathematical models based on measurements of physical quantities. Fitting procedures are described, and user interface is explained. (Contains nine references.) (LRW)

A brief overview of LabNet, a project aimed at enhancing physics education, is provided. The article focuses on a description of LabNetwork which is one of several mechanisms designed to offer LabNet participants opportunities to give and receive peer support. (ZWH)

The consistency, if any, with which force concepts are used by individual students in different, but closely related, contexts was investigated. A total of 534 university and high school students were tested to elicit their beliefs about the forces acting on various objects. Students' beliefs about the forces acting on objects at rest and in…

Discussed is whether high school students of teachers trained in the use of open-ended historical experiments dealing with light and sound perceive physics in a more favorable light. The effect of the training on the participants' classrooms on both teachers and students (n=130) is investigated. (KR)

Presents results of longitudinal study of secondary school students. Focuses on the relationship between students' cognitive development and the understanding of dynamics. Shows that majority of younger pupils show little or no cognitive progress during three-year period whereas older pupils make reasonable progress. Concludes that different…

The effect of equations in scientific proofs on readers' comprehension was studied. Forty college undergraduates solved unfamiliar physics problems with or without a traditional series of related equations. Verbal proofs produced better responses than did equation-based proofs. Equations in proofs cause readers to shift attention away from…

This study examined the problem-solving protocols of 21 students in a grade 11 enriched physics course as well as 3 adult "experts" in physics. Experts and high performing students made more correct metastatements and more references to prior knowledge than did average performing students. (DB)