EDUC 64000 Curriculum and Instruction in Elementary School Mathematics

General Resources

Concise Oxford Dictionary of Mathematics
A good basic online dictionary of mathematical terms.
National Science Digital Library (NSDL)
National Science Foundation's online library of resources for science, technology, and mathematics education at all levels.
Wolfram MathWorld
Well-organized topical encyclopedia of all branches of mathematics.
Math Forum @ Drexel
The Math Forum is a leading center for mathematics and mathematics education on the Internet. The Math Forum's mission is to provide resources, materials, activities, person-to-person interactions, and educational products and services that enrich and support teaching and learning. See especially the section of the site for teachers.

Math Education Associations

American Educational Research Association (AERA), founded in 1916, is concerned with improving the educational process by encouraging scholarly inquiry related to education and evaluation and by promoting the dissemination and practical application of research results.

International Group for the Psychology of Mathematics Education (PME), was established in 1976 to promote international contacts and exchange of scientific information in the field of mathematical education; to promote and stimulate interdisciplinary research;and to further a deeper and more correct understanding of the psychological and other aspects of teaching and learning mathematics.

National Council of Teachers of Mathematics  calls itself "a public voice of mathematics education." Its princicples and standards are available online.