Learning about heredity is important across the K-12 continuum. However, these ideas may be challenging for students. We examined third-grade students' ideas about heredity in the context of a new, six-week, model-based science unit that uses corn as a model organism to support students' ideas about heredity. We analyzed data collected during…

The authors investigated how prospective teachers enrolled in an undergraduate physical science course participated in an online forum in which they posted reactions to video episodes of children talking about science. Using Positioning Theory (Harre & Van Langenhove, 1991) as a lens, the authors analyzed 108 online posts from 26…