Describes a lesson in which instruction is initiated through the right cerebral hemisphere by using visualizations as concrete aids to learning. Explanations include a hand model which is used to illustrate the dynamics of guard cell activity of stomates and a paper folding model to show increase in surface area. (RT)

Discusses the causes and effects of conceptual errors inadvertently introduced and nurtured by scientists, teachers, and textbook writers. Cites ways to prevent the communication breakdowns that prevent the learning of science. (RT)

This study reports on the development and validation of the Attitude toward Science in School Assessment (ATSSA). Reports a low correlation between attitude and achievement tests while a moderate correlation between attitude and course grade. (Author/YP)

Describes two computer assisted tutorials, one on acid ionization constants (Ka), and the other on solubility product constants (Ksp). Discusses framework to be used in writing computer assisted instruction programs. Lists topics covered in the programs. (MVL)

Explains the operation of five relative humidity sensors: psychrometer, hair hygrometer, resistance hygrometer, capacitance hygrometer, and resistance-capacitance hygrometer. Outlines the theory behind the electronic sensors and gives computer interfacing information. Lists sensor responses for calibration. (MVL)

Indicates that a study of the environment includes protection, conservation, and management of the physical environment as well as an understanding of the processes which affect the environment. Describes the status of environmental education in the South Pacific as it relates to programs, institutions, government departments, committees, and…

Describes a grassroots organization of 500 educators from Massachusetts who attempted to influence their legislature to provide more funding for computers. Discusses the attempt to inform the legislators and the problems involved in the project. (MVL)

Presents a case study of the teaching practices of a biology teacher in Western Australia. Identifies practices considered exemplary for analysis by biology teachers and teacher educators. Discusses the methodology of the study and the qualities of exemplary teaching. (CW)

Compares different views of the role of sexual reproduction concerning the survival and evolution of species. Discusses the benefits and disadvantages of thelytoky, one nontraditional method of reproduction. (CW)

Presents an overview of 15 laboratory exercises used in an experimental ecology laboratory. Stresses that these exercises require no field work by students and are geared toward testing hypotheses. Suggests the use of these exercises in high school as well as college. (CW)

Examined were the relationships between three qualities: students' knowledge of chemical terms, the relationships they recognize between these terms, and their achievement. Used were an explanation test, an achievement test, and a connectivity test. Results indicated knowledge of terms was a necessary, but not sufficient, prerequisite for…

Reports the history, instruction, teacher training, and evaluation of a computer-programing course in China. Suggests some questions and problems relating to the course. (YP)

Provided are 25 ideas for activities that can be used to stimulate problem-solving tasks. Discussed is a demonstration using a coin and a matchbox to teach inertia. (CW)

Discusses the rationality of students' alternative frameworks by considering the role played by their beliefs, their understanding of other views, and the reasons for justification or rejection. Investigates the way in which 14-year-old boys see the effects of classroom learning experience on their ideas. (Author/YP)

Discussed are medical applications of ultrasound. The physics of the wave nature of ultrasound including its propagation and production, return by the body, spatial and contrast resolution, attenuation, image formation using pulsed echo ultrasound techniques, measurement of velocity and duplex scanning are described. (YP)