Glenn Rifkin, February 14, 2020
Tad Walch, February 14, 2020
The Washington Post, November 12, 2013
Financial Times, November 12, 2013
Forbes, November 11, 2013
edSurge, July 8, 2013
Innovation Excellence, June 30, 2013
GIGAom, May 23, 2013
Wall Street Journal, February 18, 2013
WIRED, February 12, 2013
