Students' thinking should serve as the foundation of effective science curriculum and instruction. To promote science learning, particularly in the geosciences, teachers must attend to students' existing ideas about natural phenomena through the use of ''high-leverage'' instructional practices such as formative assessment. Elementary teachers need…

Previous research suggests that elementary teachers vary in their enactment of science curriculum materials and may not always engage students in substantive sense making. This mixed-methods study investigates elementary teachers' use of science curriculum materials to engage students in the scientific practice of comparing and evaluating…