Scrum Roles and Responsibilities Game

http://tastycupcakes.org/2014/01/scrum-roles-and-responsibilities-game/

Ted talk on getting kids hooked on nature

https://www.youtube.com/watch?v=ArhjLa4xbNk

What is DevOps?

http://dev2ops.org/2010/02/what-is-devops/

Magic Estimation

http://campey.blogspot.nl/2010/09/magic-estimation.html

Free ebook: Getting Value out of Retrospectives

Free download: ebook: Getting Value out of Retrospectives. 

http://www.infoq.com/minibooks/agile-retrospectives-value

I have not read it yet, but it seems to be a nice addition to the great book Esther Derby wrote about this subject.