1. National Research Council, A Framework for K–12 Science Education: Practices, Crosscutting Concepts, and Core Ideas (National Research Council, Washington, DC, 2011).
2. Next Generation Science Standards www.nextgenscience.org.
3. Alberts B., Science 329, 491 (2010).
4. National Research Council, National Science Education Standards (National Research Council, Washington, DC, 1996).
5. Corcoran T., Mosher F. A., Rogat A., Learning Progressions in Science: An Evidence-Based Approach to Reform (Center on Continuous Instructional Improvement, Teachers College, Columbia Univ., New York, 2009).