= What's new? Happen to take CS50x last year (even if you didn't finish)? Here's what's new in CS50x 2014: * New and improved lectures! Hopefully. * Each lecture is now ≤ 60 minutes instead of ≤ 90 minutes. * Lectures are now accompanied by 106 new "walkthroughs," short videos in which David walks (more slowly) through source code from lectures plus additional examples. * Two new problem sets (Breakout and CS50 Shuttle)! * Zamyla's walkthroughs are now integrated into problem sets' specifications and are now problem-specific (rather than large, standalone videos). * Sections are now intended for students less comfortable and more comfortable alike (and for students somewhere in between). * Course no longer requires quizzes. * Some new shorts! * Course can now be taken for (transferrable) course credit through Harvard Extension School (between 29 January 2014 and 17 May 2014). * Course now offers a http://www.extension.harvard.edu/cs50-certificate[CS50 Certificate] as well as (transferrable) course credit through Harvard Extension School, if taken between 29 January 2014 and 17 May 2014, in addition to edX's (free) Honor Code Certificate. https://www.extension.harvard.edu/learn-code-harvard[extension.harvard.edu/learn-code-harvard] for more details. See http://cdn.cs50.net/2014/x/references/compare.html[this chart] to compare options. * Course now uses http://www.reddit.com/r/cs50[reddit] for discussions, in addition to https://www.facebook.com/groups/cs50[Facebook] and https://twitter.com/cs50[Twitter]. * New biweekly content produced live for online students via http://www.youtube.com/watch?v=FRYjmE7tmZU&list=PLhQjrBD2T380I7DNIDYg3CcPmS_9UVokJ[CS50 Live]. * And more!