Professional Organizations for Mathematics
Find out about professional organizations for mathematics and mathematics education many of which have student memberships.
Mathematical Association of America: http://maa.org/
American Mathematical Society: http://www.ams.org/home/page
American Association of University Women: http://www.aauw.org/
Association for Women in Mathematics: http://sites.google.com/site/awmmath/
National Council of Teachers of Mathematics: www.nctm.org
Association of Mathematics Teachers of New York State: http://amtnys.org/