The introduction of problem-based learning into K-12 science classrooms faces the challenge of achieving the dual goal of learning science content and developing problem-solving skills. To overcome this content-process tension in science classrooms, we employed the knowledge-creation approach as a boundary object between the two seemingly…

Researchers are skeptical about the role of authoritative sources of information in a constructivist learning environment for fear of usurping students' critical thinking. Taking a social semiotics perspective in this study, authoritative sources are regarded as inscriptions of cultural artifacts, and science learning involves meaning-making of…

The perspective of communities as a situated context dates back to the works of Vygotsky (1978, 1981) who posited that cognition begins at the social inter-mental level and through the process of internalization meanings become translated or assimilated into the individual level. Within this social to individual transition, learners can be…