CreativeCommons.com

I was surprised to find that my son Conor was already using this site to publish some of his music.  It allows him to share  his music while still retaining ownership of his intellectual property without having to go to a lawyer.  I was interested in the educational and science sites ( MITOPENCOURSEWARE,  Connexions, Curriki, CK-12 Foundation, Public Library of Science, Science 3.0, PLoS Blogs, etc.)  I can use these as research sites for myself and my students.  I also was thinking about taking textbook modules and modifying them for my own particular use.  This would be helpful when I want to put a unit together that isn't in my text.  It also would be good for creating a module of appropriate reading level for students that have difficulty reading the regular text (differentiated learning).