Questions on Creating Blogs and Wikis

I realized how different the K-8 environment is regarding social networking sites,where blogs and wikis fall under. The two below are developed for education:

http://pbworks.com/academic.wiki This is a site that would keep student work safe, and is especially designed for educational use.
http://www.wikispaces.com/site/for/teachers

These two are academic blog sites (if regular blog sites do not control at the level you seek)
http://www.21classes.com/shop/features
http://www.educationworld.com/a_tech/techtorial/techtorial037print.shtml

Additional resources for finding and creating blogs, and adding embedded materials to blogs:
http://mrssmoke.onsugar.com/3082114
http://www.scribd.com/doc/13856639/Helpful-Resources-for-Finding-and-Creating-Education-Blogs