I would be remiss if when mentioning graphics, not to mention Free and Fair-Use Photos. It is of utmost importance to respect copyrights when using photos not only for teachers when planning their Webspaces or Power-point presentations but for students too when working up projects! Included here is a link to an article "Learning&Leading with Technology, Ferrell, Keith, September/October 2012 Vol. 40 No. 2 pg 30" for a list of super graphic sites that you are 'free' to use!