Lancaster: American Mathematical Society, 1940–. The most comprehensive database for mathematics research, covering all types of publications with annotations written by reviewers.
http://www.agnesscott.edu/lriddle/women/women.htm. An extensive collection of biographical information about the contributions of women to mathematics. The site can be searched or browsed alphabetically or chronologically. Profiles are compiled by students and faculty at Agnes Scott College.
http://www-groups.dcs.st-and.ac.uk/~history. Provides biographies, historical overviews of topics, the history of mathematics in different cultures, and a “famous curves” page with illustrations, formulas, and other information. Maintained by staff at the St. Andrews University (Scotland) School of Mathematics and Statistics.
http://mathforum.org. An online resource for math teachers, offering problems and puzzles as well as a directory of quality Web sites. From Drexel University School of Education.
http://www.ams.org/mathweb. A directory of mathematics resources from the American Mathematical Society. The selection of sites by topic is particularly useful.
http://wise.cgu.edu. Offers a selection of teaching resources, including tutorials on statistics topics as well as applets that demonstrate statistics principles. From the School of Behavioral and Organizational Sciences at the Claremont Graduate University.
Ed. I. Grattan-Guinness. 2 vols. London: Routledge, 1994. Offers lengthy, well-documented articles on the historical basis of mathematics and the cultural production of mathematical understanding.
Ed. Eric W. Weisstein. 2nd ed. Boca Raton: CRC, 2003. Offers over 3,000 pages of accessible information about mathematics and its applications in physics, biochemistry, chemistry, biophysics, and engineering.
Ed. Samuel Kotz. 2nd ed. 16 vols. New York: Wiley, 2006. An in-depth exploration of all fields of inquiry in which statistical methods are used. The work includes articles on statistical terminology.
4 vols. New York: Simon and Schuster, 1956. This gem can sometimes provide answers to the most arcane questions, while conducting a tour through the history and traditions of mathematics. The work is dated and therefore does not cover recent developments, but it has excellent background material that is easily accessed using the thorough index.