Teachers of 9 and 10 year olds were found to use varied versions of lessons that increase conceptual understanding. Their effectiveness in supporting conceptual understanding was compared experimentally. Findings and implications for science teaching are discussed. (Author/DKM)

Discusses students' perceptions of using writing as a component of their science learning. Results, collected over four years, are organized to include students' perceptions of writing in science, learning, ownership, purpose, and science. These results are then discussed in terms of students' developing metacognition and epistemologies of…

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…

Describes a case study of an experienced provocateur-teacher in which the teacher's theory for science learning and teaching during teacher-student interactions was inferred from classroom observations, teacher-student discourse, and stimulated recall interviews. The teacher's instructional moves were interrelated with the components of his…

Reports on a study of 323 Nigerian secondary students to determine what relationship exists between preferred and actual classroom environments and their approaches to learning science. Finds that Nigerian students prefer more teacher control, a less competitive atmosphere, and less emphasis on student friendships. (CFR)