free software, free speech glyn moody 30+ years of free software Richard Stallman (born 1953) hacker at MIT's AI Lab free operating system GNU project 1983 "GNU's…
Community authoring of worked example problems Putting the world to work for ITS: Aleahmad, Aleven and Kraut 6/27/2008 ITS 2008 Open community authoring of targeted worked…