Recent reforms in K-12 science education call for curricular materials that are designed to be "coherent for students." This form of coherence arises when the classroom community sees their science work as addressing their questions and problems. In enactment, the teacher sometimes has to improvise from the planned trajectory of the…

This study examines cognitive and social processes in group interactions that shape collaborative learning in science classrooms. Three small groups of students were observed while working collaboratively on explaining the burning of a candle under a jar. The learning environment served as a context for examination of conceptual convergence, a…

This study quantified possible changes in the classroom learning experiences of high- and low-ability pupils, which might accompany an organizational change from streamed to mixed-ability classes for science learning in secondary schools. Deteriorations in the quality of the classroom interactions of both high- and low-ability pupils were found.…