I am looking for a good resource (i.e. book) on differentiation in science, specifically chemistry if possible, at the high school level. As I look through the available material, I find that the materials are all directed to the elementary or middle school level. My colleagues and I have discussed our district's differentiation mandate and feel that high school science is a particularly difficult subject area in which to implement this. I am trying to keep an open mind, but need a resource that specifically addresses the needs of my classroom.

Thanks,
Lou