Moving NGSS to Instruction What is the intent of the PE/learning? What depth is intended? What are the key concepts for learning? What will students need to know or do to show mastery? 08-LS2-4 Construct an argument supported by empirical evidence for how changes to physical or biological components of an ecosystem affect populations. [Clarification Statement: Emphasis is on recognizing patterns in data and making warranted inferences about changes in populations, and on evaluating empirical evidence supporting arguments about changes to ecosystems.] Knowledge Define empirical evidence and inference Identify physical and biological components in an ecosystem *Does not refer to Performance Expectation Reasoning AND Skill/Performance* Analyze patterns in data in order to make inferences and predictions (claims) about changes in populations Construct an argument, supported by evidence, to back up those claims. Products