Chemical bonding is central to explaining many phenomena. Research in chemical education and the Framework for K-12 Science Education (the "Framework") argue for new approaches to learning chemical bonding grounded in (1) using ideas of the balance of electric forces and energy minimization to explain bond formation, (2) using learning…

In this chapter, eight foci relevant for science educators are presented and illustrated by paradigmatic examples and discussed in two parts. The first part "from science education to practice and authorities" discusses the four foci of: (1) developing concepts for instruction; (2) responding to the needs of schools; (3) connecting…

This study describes the process of defining a hypothetical learning progression (LP) for astronomy around the big idea of "Solar System formation." At the most sophisticated level, students can explain how the formation process led to the current Solar System by considering how the planets formed from the collapse of a rotating cloud of…