The practices are what students DO to make sense of phenomena. They are both a set of skills and a set of knowledge to be internalized. The SEPs reflect the major practices that scientists and engineers use to investigate the world and design and build systems.
End of instruction goals or benchmarks for student proficiency.
Storylines are statements that describe the context and rationale for the Performance Expectations (PEs) in each grade band and section.
The goal of summative assessment is to evaluate student learning at the end of an instructional unit by comparing it against some standard or benchmark.