There are very few things as frustrating as excessive Internet filtering when you're trying to integrate technology into classroom. Some filtering can be good and is actually required, but I have visited a lot of schools in which the filtering goes way beyond what is actually needed. Sometimes the reason for the excessive filtering is based on misunderstanding of requirements. In this KQED interview in 2011 Karen Cantor dispelled some of the myths about Internet filtering requirements. If you're working in a school that is blocking a lot more than you think it should be, read the article and interview transcript then pass it along.