Adopting new instructional materials is an important way to support reform in science education, but implementation can be challenging and complex. Therefore, we conducted a contrasting case study of two middle schools implementing new curricular materials. We conducted semi-structured interviews with teachers and leaders and collected…

The adoption of the Next Generation Science Standards (NGSS) requires many teachers to drastically change their classroom instruction. Curricular materials offer a tool to support this transition, but there are questions about the degree to which available curricula truly reflect the shifts required by the NGSS. This study proposes a framework of…