To improve the teaching and learning materials for a curriculum it is important to incorporate the findings from educational research. In light of this, we present creative exercises and experiments to elicit, confront and resolve misconceptions in geometrical optics. Since ray diagrams can be both the cause and the solution for many…

The study reported here extends the investigation begun by Piaget of content effects to laboratory and naturalistic tasks. If the accuracy and completeness of the subjects' expected variables is related to content, then performance on laboratory and naturalistic tasks should differ systematically. The subjects' expected variables were measured by…

Eight articles in this this theme issue explore aspects of supervised occupational experience (SOE) in agriculture: definitions, new directions, the value of SOE, experiential learning, the science of agriculture, production agriculture, hydroponic technology, and Future Farmers of America proficiency awards. (SK)

Discussed are two contrasting views about the nature of scientific thinking including Pearson's and Collingwood's. The contexts of questions, methods, problems, experiments, and history are described as contexts of inquiry. The physical thoughts of scientists from pre-Aristotelian times to the present are outlined in relation to contexts of…

Most physics problem-solving studies provide data that indicate problem representation is different between experts and novices. This paper presents "cognitive aids" guiding the process of elaboration of a problem representation through intermediate representations. Intermediate means that the representation is situated somewhere between…

Investigates the influence of five cognitive variables on high school students' performance on balancing chemical equations by inspection. Reports that reasoning, restructuring, and disembedding variables could be a single variable, and that working memory capacity does not influence overall performance. Results of hierarchical regression analysis…

Answers a student's question about the emission of a positron from a nucleus. Discusses the problem from the aspects of the uncertainty principle, beta decay, the Fermi Theory, and modern physics. (YP)

Demonstrated in this article are some of the capabilities of a spreadsheet program using data obtained in gas law experiments and a computer interface system. The ability to organize and analyze data which a computer can provide for the student is emphasized. (KR)

Biology teachers can provide lessons for students to help them plan the future wisely. Three natural laws are emphasized as imperative to understanding how to plan wisely for restoring a balance in nature. (SA)

Described in this article is a problem-solving activity which integrates the application of microcomputers with the learning of physical chemistry. Students use the program with spectroscopic data to calculate the thermodynamic properties and compare them with the values from the thermochemical tables. (Author/KR)

Describes action research on the efficacy of problem-based learning using a hermeneutic dialectic methodology. Focuses on the emergence of students' critical-thinking skills, the relevance of science concepts taught, the interdisciplinary nature of the problems addressed, and the changing roles of the teacher and students. Reports that the course…

Reviews the traditional definition of practical work in science, offers a different definition of it, and points out that practical work is not always laboratory based. Discusses the logistics of coordinating fieldwork. Contains 17 references. (DDR)