Internet Resources

http://standards.nctm.org/document/chapter3/index.htm
	This is the standards chapter in the Principles and Standards for School Mathematics of the National Council of Teachers of Mathematics. Select Number and Operations from the left column for across-the-grades standards. For specific grade level standards select Pre-K - 2, 3 - 5, or 6 - 8, from the top row. ( http://standards.nctm.org/document/chapter3/index.htm )

http://www-groups.dcs.st-and.ac.uk/~history/Indexes/HistoryTopics.html
	This site contains the history of several ancient numeration systems. Select the Mayan, Babylonian, or Egyptian systems. ( http://www-groups.dcs.st-and.ac.uk/~history/Indexes/HistoryTopics.html )