This study examines the effects of the activity of building systems models for school-based problems on problem solving and on conceptual change in elementary science classes. During a unit on the water cycle in an Asian elementary school, students constructed systems models of the water cycle. We found that representing ill-structured problems as…

Rather than learning and then applying theory to the solution of problems, learners can be provided with stories about others' experiences while designing classroom instruction. However, the usability of case-libraries has not been documented with teachers. In this study, students accessed a case-library of technology integration stories…