AMATYC, The American Mathematical Association of Two-Year Colleges, http://www.amatyc.org
AMS, American Mathematical Society, http://e-math.ams.org/
AMTE, Association of Mathematics Teacher Educators, http://www.amte.net/
MAA, The Mathematical Association of America, http://www.maa.org/
NADE, National Association for Developmental Education, http://www.nade.net/
NCTM, National Council of Teachers of Mathematics, http://www.nctm.org
ATOMIC, Associated Teachers of Mathematics in Connecticut, http://www.atomicmath.org/
NEMATYC, New England Mathematical Association of Two-Year Colleges, http://www.NEMATYC.org
Common Core State Standards Initiative, Mathematics, http://www.corestandards.org/Math
Connecticut State Department of Education, Mathematics, http://www.sde.ct.gov/sde/cwp/view.asp?a=2618&q=320872
The MacTutor History of Mathematics Archive, http://www-history.mcs.st-and.ac.uk/~history/
The Math Forum, Drexel University, http://mathforum.org/
The Mathematical Quotation Server, http://math.furman.edu/~mwoodard/mquot.html
NASA, National Aeronautics and Space Administration, http://education.nasa.gov/
NSF, National Science Foundation, http://www.nsf.gov/
PIMMS, Project to Increase Mastery of Mathematics and Science, http://www.wesleyan.edu/pimms/
TI Calculators, http://www.ti.com/calc/
U.S. Department of Education, http://www.ed.gov/