1NGSS. Next Generation Science Standards [M]. Washington, D C: The National Academies Press, 2013.
2Nlational Research Council. Systems for State Science Assessment [M]. Washington, D C: The National Academies Press, 2005 : 3,.
3National Research Council. Taking Science to School.. Learning and Teaching Science in Grade K-8 [M]. Washington, D C: The National Academies Press, 2007:214.
4MICHAELS S, SHOUSE A W, SCHWEINGRUBER H A. Ready, Set, Science! Putting Research to Work in K-- 8 Science Classrooms [M]. Washington, D C: The National Academies Press, 2008:38.
5CORCORAN T, MOSHER F A, ROGAT A. Learning Progressions in Science [R]. Consortium for Policy Research in Education (CPRE), 2009 : 13.
