Describes a series of activities exploring Leonardo da Vinci's tree theory that are designed to strengthen 8th grade students' data collection and problem solving skills in physical science classes. (KHR)

Reports the results of an investigation into factors associated with variations in students' ability to achieve conceptual learning gains in a physics course that employs interactive-engagement methods. Explores the correlation between students' normalized learning gains and their initial level of physics concept knowledge, pre-instruction…

Instructions for the construction of this instrument and its use are presented. The use of common materials is emphasized. (CW)

Discussed is the teaching of physics with an emphasis on the learning of concepts before problem solving. Examples of this approach are provided. (CW)

The school system, programs, textbooks, teachers, supplemental studies, and special schools of the Soviet Union are discussed from the point of view of two Soviet students. Secondary school and college education are the primary focus. (CW)

Presented are two cases of simple geometrical calculations involving the large numbers of atoms that are encountered in two ordinary situations. Included are questions about the spatial implications of the genome and a mole of hydrogen. (CW)

The solution to this problem is discussed using the same calculations as when calculating the temperature of a planet. The confirmation of these calculations by doing an experiment is described. (CW)

The experience of one high school in New York State offering physics to freshmen is described. Advantages and disadvantages of this approach are discussed. Curriculum alternatives within the New York State guidelines are presented. (CW)

Significant information on the relative thickness of plutons, the structure of poorly exposed or concealed magnetic units, and possible evidence of mineralized ground are discussed. The techniques used to produce images that reveal the new information are described. A list of 34 references is included. (CW)

Presented is a science activity which explains the discrepancies found between summer and winter solstice sunrise and sunset times. Used is a mathematical equation which takes into account the earth's changing speed and the tilt of the earth. (KR)

Investigates the relationship between knowledge of geometrical optics and the understanding of the phenomenon of colored shadows through adult interviews. Reports that the knowledge of geometrical optics facilitates the pinpointing of the color problem while experience with the mixing of paints may act as a barrier. (Author/YP)

The nature of cluster analysis and dendograms, subjects, tasks, and results of this study are described. Categories for problems were based on assumptions about the methods used by novice and expert problem solvers in a physics context. (CW)

Discusses experiments with students and teachers in a project to encourage girls to achieve their full potential and to consider nontraditional career choices. Describes a two-week practice program and opposition to the project from teachers and girls. Outlines an extensive course in physics and effects of the course. (YP)

Described is a science activity which illustrates the principle of uncertainty using a computer simulation of bacterial reproduction. Procedures and results are discussed. Several illustrations of results are provided. The availability of a computer program is noted. (CW)

Discusses some incorrect representations of electric fields in textbooks. Considers total charge or charge density and two- or three-dimensional diagrams. (YP)