Demonstrations to help students change their misconceptions about chemical bond breaking are presented. Students' misconceptions about chemical bonds in both biological and chemical systems are discussed. A calculation for the release of energy from respiration is presented. (KR)

The efforts to enlarge the awareness, scientific knowledge, and political skill of people, to promote pro-environmental attitudes and support, through the development of science/technology/society (STS) courses are described. The STS program found in the secondary schools and colleges of Quebec is described. (KR)

The forces and torques experienced by the spine are examined to understand, and possibly avoid, low back pain. The structure, degrees of freedom, forces and torques when lifting objects, an experimental study, and other factors affecting the back are discussed. (KR)

Explored are ways in which spreadsheets can be used in the teaching of chemistry. Some of the limitations of using algebraic modelling tools are highlighted. Several example applications are provided. (CW)

Examined is teacher thinking which develops during curriculum and methodology courses for intending teachers of secondary school science. A science teacher thinking framework which includes subject matter, teaching strategy, objectives, and student response was developed. The importance of reflective thinking is discussed. (KR)

Described is a systematic plan for implementing a national curriculum development effort in science education in Pakistan. The stages, curriculum tasks, and evaluation tasks of the six-year program are included. Implications for other developing countries are addressed. (KR)

Discussed is a constructivist model of science learning and its possible use in the treatment of science misconceptions. Science learning as conceptual and methodological change is described. (KR)

Presented is an approach to the study of nutrient cycling in the school laboratory. Discussed are obtaining, processing, and incubating samples; extraction of ions from soil; procedures for nitrate and ammonium analysis; data analysis; an example of results; and other aspects of the nitrogen cycle. (CW)

Described is a cost-effectiveness analysis applied to the question of the probable impact of 69 actions advocated for improving science education. The major objectives and the 11 categories of interventions are discussed in regard to effective schools and implementing educational change. (KR)

Determined was the effect that cooperative groups heterogeneously based on proportional reasoning ability have on problem solving in regular and honors high school chemistry. Characteristics of successful and unsuccessful problem solvers individually and in groups are discussed. (KR)

Discusses some of the definitions of successful instruction stated or implied by researchers in science education and examines reasons for the diversity of definitions. Describes how a high school chemistry teacher decides whether his or her instruction is successful and how these assessments influence instructional practices. (PR)

Investigates predictors of Korean student's choice of science track (n=665). It was concluded that attitude toward science track influences the intentions of the students. (PR)

The ways in which the concept of acceleration is treated in physics textbooks is compared with understandings of the concept demonstrated by final-year secondary (n=30) and first-year university students (n=60). Some students' understanding are shown to be incomplete in ways that parallel misleading or inaccurate textbook treatment of the concept.…

Explains how a useful stereo image for overhead projection can be easily produced using technology available to most teachers. Red and green transparency films and red/green glasses are used to produce the three-dimensional view. (PR)

Presents activities in which students construct simple crystal radio sets and amplifiers out of diodes, transistors, and integrated circuits. Provides conceptual background, materials needed, instructions, diagrams, and classroom applications. (MDH)