In an era increasingly awash with numbers, how can one parse it all out? How is it possible to separate the proverbial quantitative chaff from the valuable wheat? Carleton College has taken on this weighty matter with their Quantitative Inquiry, Reasoning, and Knowledge Initiative (QuIRK). On the site, visitors will find sections that include Curricular Materials, Quantitative Reasoning...

With funding from the National Science Foundation, the Learning & Performance Support Laboratory at the University of Georgia has created this website for mathematics educators. Their primary focus is to build teachers’ mathematical content knowledge through mathematical investigations, and the resources presented here reflect this commitment. The primary mathematical fields covered here include...

How much can you really learn from one number a day? Quite a bit actually, and this fun feature from the Mathematical Association of America (MAA) may prove to be rather addictive. Posted daily since September 2008, the MAA posts a number (for example, the number 11,185,272) and then offers a selection of that number's properties. Visitors to the site can click on some of the external links, look...

Located at the University of Illinois at Urbana-Champaign, The Office for Mathematics, Science, and Technology Education is primarily interested in creating resources for educators working on these topics. First-time visitors should definitely start by looking through the "Resources" area, as they will find classroom tested exercises that cover basic topics in algebra, trigonometry, and a number...

This website is an excellent resource for math teachers teaching any age and level of students. The National Council of Teachers of Mathematics (NCTM), "support[s] teachers to ensure equitable mathematics learning of the highest quality for all students through vision, leadership, professional development and research." Visitors interested in making math fun will certainly want to read the lead...

The World of Numbers is "an amalgamation of randomly gathered numbers, curios, puzzles, palindromes, primes, gems, your much valued contributions and more general information." Choosing "number palindromes" from the drop-down menu will take you to a page with a list of links to webpages on palindromes -- numbers that read the same from left to right as from right to left. Also posted are more...

Are you a numberphile? Maybe you are and you don't know it yet. If you have any interest in topology, geometry, algebra, or other facets of math, this website may be right up your alley. Created by Brady Haran, the site contains hundreds of entertaining videos, including titles like "Unboxing Calculators," "Politics and Numbers," and the very engaging "Pi and the Size of the Universe." Visitors...

PBS has developed a number of websites for educators, and their PBS Teachers site has received a number of accolades and high praise from diverse quarters. First-time visitors to the site may wish to first use the drop-down menus here to select a grade range and a topic that interests them. After doing so, a set of relevant materials will be offered to them, organized by topic and intended grade...