One of the key agendas for the emerging field of disciplinary-based education research is the evaluation of the trajectory of disciplinary knowledge development from novice to expert. However, with the ongoing promotion of student-centered and collaborative undergraduate science classrooms, it is unknown how peer discourse during these exercises…

There is growing recognition of the importance of helping children to develop an ability to think about biological and environmental issues in terms of systems interactions and impacts. Several progressions have been published that suggest how their conceptual understandings may develop over time. However these are not necessarily as informative…