"The Khan Academy is the best thing that has happened to education since Socrates" http://bit.ly/igdlF9
You can add location information to your Tweets, such as your city or precise location, from the web and via third-party applications. You always have the option to delete your Tweet location history. Learn more
"The Khan Academy is the best thing that has happened to education since Socrates" http://bit.ly/igdlF9