This is a near-complete rewrite of all of the exercises live on the site currently. The scratchpad text tool has been removed because it doesn't provide much th

This is a near-complete rewrite of all of the exercises live on the site currently. The scratchpad text tool has been removed because it doesn't provide much that isn't easily available via other means. You can see the beta of the new site at: http://khan-masterslave.appspot.com/ http://khan-masterslave.appspot.com/ (Please report issues on GitHub if you find any.)