This research investigated the emergent discursive modes and their pedagogical functions found in model-based inquiry (MBI) science classrooms. A sample of four high school physics classrooms was video-recorded and analysed using a newly established discourse mode analysis framework. Qualitative methods were employed to identify the most salient…

This study examines the impact of "Disaggregate Instruction" on students' science learning. "Disaggregate Instruction" is the idea that science teaching and learning can be separated into conceptual and discursive components. Using randomly assigned experimental and control groups, 49 fifth-grade students received web-based…

Proposes that language awareness cannot be fully developed if it rests on a view of language from within. Suggests that language is always one of a number of semiotic modes in use in any act of communication, and that language may not be central mode. To get sense of modes of communication involved, a condensed account of a science lesson on plate…

The paper presents an intensive study of a micro-event aiming at the characterization of teacher's discourse from a multimodal communication perspective in a secondary school science classroom dealing with the topic of "water cycle." The research addresses the following questions: (a) What communicative modes are used by the teacher?, (b) what…

Summarizes content analyses of verbatim transcripts of secondary chemistry lessons. Finds that the use of words with a metacognitive and metalinguistic function was generally limited in extent and simple and colloquial in expression and that the language of the enacted curriculum did not match the terminology of the official curriculum document.…

Examines the relationship between new biology teachers' subject matter knowledge and classroom discourse, contrasting classroom discourse during laboratory investigation with discourse during other classroom activities. Data analysis suggests that knowledge and control are related but in ways unique to the communicative context of the laboratory.…

Focuses on how one teacher examined classroom discourse through a unit on tornadoes and natural catastrophes. Defines various types of discourse and discusses how discourse in a 6th grade class was analyzed. Details some of the activities that engaged students. (DDR)

This paper analyzes discrepant findings from research on science teacher knowledge and classroom discourse. In new science teachers' classrooms, discourse during laboratory activities differed in important ways from discourse during other types of instruction. Furthermore, teacher subject-matter knowledge had effects that were not predicted by the…