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Among the stats - 500 Billion minutes/month spent on Facebook - and it's only been in existence for 5 years.

Shorten URLs with more information about them.

An interactive site with activities for numbers, patterns & relations, shape & space, Stats & probability.

As Twitter surges toward an estimated 12 million registered users by year's end (though some new stats may disagree), some of us are starting to deal with what we recently dubbed "followholism." You've followed so many people, it's hard to keep up, and it's probably time to do a little housekeeping. But where do you begin? Twitter's own tools for managing followers are subpar. It's nearly impossible to figure out who among your followers are following you back, and the interface for paging through followers is clumsy and difficult to use. Fortunately, Twitter's API has given rise to a vast universe of amazing third party apps. So we've assembled a toolkit below of 10 services that can help you take control of Twitter and organize your followers. If you know any other tools that would be helpful for organizing tweeps, add them in the comments.

"A lengthy 6,000 pixels long infographic takes you though the key events of the last five years and then breaks out the biggest channels, advertisers (they are monetizing over a billion video views per week), top videos of all time and some great demographic data. "

...when the elementary and middle school students come back next fall, there won't be any grade levels--or traditional grades, for that matter.

Media Cloud is a system that lets you see the flow of the media. The Internet is fundamentally altering the way that news is produced and distributed, but there are few comprehensive approaches to understanding the nature of these changes. Media Cloud automatically builds an archive of news stories and blog posts from the web, applies language processing, and gives you ways to analyze and visualize the data.

Online library of datafiles and stories that illustrate the use of basic statistics methods

Just about ANY statistic you could want on any of the cities in our 50 states. Definitely worth investigating!

The data and terminology presented in the Historical Census Browser are drawn directly from historical volumes of the U.S. Census of Population and Housing.