http://www.researchgate.net/profile/Douglas_Clements /http://du.academia.edu/DouglasClements

http://www.triadscaleup.org/

www.routledge.com/books/Learning-and-Teaching-Early-

Math-isbn9780415995924

www.LearningTrajectories.org

The Surprising Importance of Early

Math Dr. Douglas H. Clements &

Julie Sarama Kennedy Endowed Chairs & Professors

University of Denver Julie.Sarama@du.edu

Douglas.Clements@du.edu

www.mheonline.com/earlychildhoodconnection/

http://www.buildingblocksmath.org/

NRC www.nap.edu/openbook.php?record_id=12519&page=R1

National Math Panel—http://www.ed.gov/

http://corestandards.org/ http://commoncoretools.wordpress.com/

NCTM — www.nctm.org