When you say "differentiation of reading instructing", what exactly do you mean? I use web 2.0 tools to help provide reinforcement and extension of what we may doing in class. For example, a video embedded into a blog post on white-water rafting that ties into a Jamestown story we are working on. After watching the video, reading the story, and discussion I have the students submit comments that reflect their understanding and personal views of the story and how it applies to their own life. I have also begun to use story starters with the class wiki... students then each add one sentence to it. This allows students to creatively add their own thoughts and encourages them to read what others have added already. In both cases I evaluate students based on their own individual skill level.