Describes a system of heuristics for problem solving and instructional methods for presenting it to secondary school students. (CS)

Describes the specifics of instruction in thermodynamics using a problem-solving technique introduced in a previous issue of this journal. (CS)

Explores the relationship of an individual's reliance or nonreliance upon concrete cues in problem solving and performance on a model-based measure of hierarchical classification. Level of cognitive development, as determined by performance on Piaget-type tasks, generally predicted hierarchical classification ability of junior- and senior-high…

Definitions of estimating and approximating are given and areas where these skills are used (such as practical situations, problem solving, and measurement) are discussed. Nine activities which range from second to twelfth-grade level are suggested. (MK)

Forty-five children, ages nine through eleven, were divided into control group and experimental groups that read or wrote hunches concerning a discrepant event involving sliding blocks. Those who generated hunches were shown to learn more in subsequent inquiry behaviors designed to explain the discrepant event. (MLH)

Uses a new set of 14 open-ended problems to gain some initial insights into the way pupils solve open-ended chemistry problems. Emphasizes how concepts and linkages between concepts influence success in solving such problems. Suggests that creating links between "islands" of knowledge is an important skill in problem solving. (Contains 37…

The president of the Massachusetts Institute of Technology reflects on two fundamental principles of liberal education, that liberal education allows us to: (1) understand ourselves; and (2) act. He observes that problem solving is becoming more interdisciplinary, thus creating a greater need for liberal education. (DB)

Discusses and provides an example of reflectivity approximation to determine whether reflection will occur. Provides a method to show thin-film interference on a projection screen. Also applies the reflectivity concepts to electromagnetic wave systems. (MVL)

Provides a problem where students are asked to find the point at which a soda can floating in some liquid changes its equilibrium between stable and unstable as the soda is removed from the can. Requires use of Newton's first law, center of mass, Archimedes' principle, stable and unstable equilibrium, and buoyant force position. (MVL)

Describes a study of concept mapping as a means of learning problem-solving skills. Concludes that the concept mapping subjects were significantly more successful at solving biological test questions than were the controls. Reports no significant differences between cooperative and individual mapping and mixed results for gender. (DK)

Reviews the literature concerning problem solving in science education. Authors contend that the adoption of a forward-looking viewpoint of science has increased the attention given to the topics of discovery and problem-solving behavior. Authors conclude that research by philosophers of science on models and problem solving include insights to…

A discussion of what E=mc2 means and other issues associated with the equation are presented. The differences between matter, mass, and energy, a derivation of the equation, the history of the word mass and examples of how it is used, misconceptions surrounding the equation, and a discussion of uranium fission are included. (KR)

A procedure for estimating the speed and distance of plane, assuming the speed of sound and the velocity of the plane are constant, is described. (KR)

A procedure for measuring the speed of light using the assumption that the frequency of light remains unchanged as it moves from one medium to another is presented. A laser with a known wavelength and frequency in air was used as a light source. (KR)

The purpose of this study was to elucidate the relationship between students' procedural and declarative problem solving associated with one particularly important problem-solving skill, prediction. The results confirm that successful prediction problem solving involve an intricate network of relevant declarative knowledge that is manipulated and…