Defines 13 concepts involved in understanding ionic equations and suggests the order in which they should be taught. Also analyzes incorrect responses on an ionic equations student exam. (MLH)

Describes how Newton's three laws of dynamics are taught in high school in the Soviet Union. Rejects introducing Newton's second law as an equation defining mass as a proportionality constant. Shows how the concept of mass can be introduced independently of Newton's Law. (GA)

Discusses and clarifies the relationship between the energy-momentum tensor and the velocity of energy flow. (Author/GA)

Discussed are aspects of the use of mathematical models in the teaching of oscillation theory. (MDR)

Discusses the concept of elementary particles. Reviews the history of the neutrino, and explains why the quarks, although they themselves are not "observed" in isolation, are to be considered elementary particles. (GA)

Discusses the nature of science and addresses the question of why scientific knowledge cannot be absolute. (SL)

Discusses problems in defining science as a fundamentally distinct endeavor. (SL)

Second of a two part article reviewing the underlying concepts involving the mole concept. (SL)

Describes a 14 unit remedial chemistry course which offers a traditional lecture approach and a Personalized System of Instruction (PSI) approach for preparing students a traditional chemistry sequence. (SL)

Reviews polymer chemistry as a means of presenting concepts and principles in physical chemistry. (SL)

The authors gave a series of simple demonstrations followed by questions to which ninth grade students provided written answers to assess their ability to perform tasks for conservation of amount, weight and volume. Responses were varied. The paper includes the test form and a few typical answers. (AJ)

A Drinking Bird toy is used to stimulate scientific questioning and problem solving. Suggestions are given for using the bird to explore scientific concepts including evaporation, work, systems, density and dynamic equilibrium. 32 questions you can use to stimulate student investigations are listed. (AJ)

Presents information on the properties and largest spirals of the Local Group galaxies. Explains the three categories of galaxies, identifies the brightest members of the Local Group, and discusses recent discoveries within the group. (ML)

Promotes the study of ancient rocky shores by showing how they can be recognized and what directions future research may follow. A bibliography of previous research articles, arranged by geologic period, is provided in the appendix to this paper. (CW)

The relationship of cognitive development to learning science is considered. Views of thinking from both a psychological and a scientific standpoint are compared in order to shed light on current science teaching practice. Metacognition and problem solving are discussed. (Author/MT)