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2Andrew Porter, Jennifer McMaken, Jun Hwang, Rui Yang. Common Core Standards: the new U.S. intended curricu- lum. Educational Researcher, 2011, (3) : 103 - 116.
3National Governors Association & Council of Chief State School Officers. Common Core State Standards for mathematics [EB/OL]. www.corestandards.org/assets/CCSSI_ Math%20Standards.pdf. 2010-06-02.
4National Governors Association & Council of Chief State School Officers. Common Core State Standards for English Language arts & literacy in history/social studies, science, and technical subjects [EB/OL]. www.corestandards.org/as- sets/CCSSI_ELA%20Standards.pdf. 2010-06-02.
5United States Coalition for World Class Math. The U.S. Coalition for World Class Math Presents Design Principles for K-12 Mathematics Standards and Assessments [ EB/OL]. http://usworldclassmath.webs.com/.2010-07-12.
6National Council of Teachers of Mathematics. NCTM public comments on the Common Core Standards for Mathematics [ EB/OL ].www.nctm.org/about/content.aspx?id=25186. 2010- 04-02.
7National Governors Association & Council of Chief State School Officers. Reactions to the March 2010 Draft Com- mon Core State Standards: Highlights and Themes from the PublicFeedback[EB/OL].wwwcorestandardsorg/assets/k- 12- feed back-summary.pdf. 2010-06-02.
