Discusses student and teacher perceptions of a new development in the use of the predict-observe-explain (POE) strategy. This development involves the incorporation of POE tasks into a multimedia computer program that uses real-life, digital video clips of difficult, expensive, time consuming, or dangerous scenarios as stimuli for these tasks.…

Details a study exploring a problem-based learning framework used to develop preservice teachers' knowledge base for teaching and pedagogical reasoning ability. Emphasizes an undergraduate preservice science teacher education unit. Contains 30 references. (DDR)

The purpose of this research was to develop and validate a new instrument, the "Mental State in Learning Environment Questionnaire" (MSLEQ), to assess student's mental state in a given learning environment. The MSLEQ has high internal consistency reliability values between 0.70-0.92 as well as good construct validity and predictive validity. After…

This research investigated the sources of explanations and understanding of natural phenomena in terms of the students' cultural and school science experiences. The first phase involved interviews with eight village elders that probed their explanations and understanding of natural phenomena. The second phase involved the design, development and…

Examines student perceptions of the changing nature of a classroom as a result of the implementation of constructivist approaches. Results indicate that students are appreciative of the opportunity to use their own ideas and knowledge. Contains 31 references. (DDR)

Describes a conceptual typology of models to help teachers select models appropriate to the cognitive ability of their students. Presents an example of how the systematic presentation of analogical models enhanced an 11th-grade chemistry student's understanding of atoms and molecules. Makes recommendations for teachers. Contains 28 references.…

Chemistry is commonly portrayed at three different levels of representation--macroscopic, submicroscopic and symbolic--that combine to enrich the explanations of chemical concepts. In this article, we examine the use of submicroscopic and symbolic representations in chemical explanations and ascertain how they provide meaning. Of specific interest…

Explores a case study of a class of 10th grade students whose learning of genetics involved activities using BioLogica, a computer program that features multiple external representations (MERs). Findings indicate that the MERs in BioLogica contributed to students' development of genetics reasoning by engendering their motivation and interest but…

Responses of Australian students from grade 8 (n=53) and grade 9 (n=56) to questionnaires concerning health and fitness were correlated to locus of control. A significant negative correlation was found between student knowledge and the belief that health and fitness are controlled by chance. (Contains 14 references.) (MDH)

This study investigates whether the generation of exploratory talk in grade seven, second-language science classrooms in the Eastern Cape Province, South Africa, has a positive effect on learners in terms of their problem-solving and reasoning skills and whether socio-cultural "milieus" (urban, peri-urban and rural settings of schools)…

This study reports research findings on assessment of the science classroom learning environment and its association with two student outcomes--attitudes toward science and national examination scores. Modified versions of the WIHIC and TOSRA questionnaires in the Indonesian language were administered to 1400 students and their teachers. This…