I think just about any teacher worth her or his salt is likely to do a lot of differentiation of instruction. Heck, I’m going to go out on a limb and suggest that some of the better teachers in your school were doing it before it was coined differentiation. As educators and administrators, we need to push for differentiation in professional development. Here are a few ideas how.
http://www.teachingwiththecloud.com/2011/05/five-tips-to-differentiating-tech.html