Triadic dialogue, the Initiation, Response, Evaluation sequence typical of teacher /student interactions in classrooms, has long been identified as a barrier to students' access to learning, including science learning. A large body of research on the subject has over the years led to projects and policies aimed at increasing opportunities for…

Describes a case study of an expert teacher's questioning strategies during an open-inquiry engineering curriculum in a grade four and five classroom. Analysis provides evidence for the complexity of questioning that is characterized by the interactions of context and content of, and response and reactions to, questions. Contains 45 references.…