A set of core ideas in the life sciences revolve around genetics, variation, and inheritance. While the "Next Generation Science Standards" (NGSS; NGSS Lead States 2013) emphasize teaching and learning about these concepts across K-12 grades, it is critical for early learners to begin to develop understanding of them. By the end of fifth…

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…

A Framework for K-12 Science Education (NRC 2012) includes inheritance as a core idea within the life science framework. For example, life science core idea 3A states that by the end of second grade, children's knowledge should include the ability to recognize and investigate physical differences and similarities among the same kind of…