Comments on: Good problems http://helenemartin.com/2012-02-good-problems/?utm_source=rss&utm_medium=rss&utm_campaign=good-problems You don't understand something until you've taught a teenager to teach a computer to do it. Mon, 08 Apr 2013 04:47:39 +0000 hourly 1 http://wordpress.org/?v=3.6.1