There are always a ton of worksheets and activities online for the general education classroom but it is always harder to find them for special education classes. I came across a site with some pretty neat free printables today. The website is called SEN Teacher and there are printables for behavior charts, working on feelings and teaching facial expressions.
I also found a website with several graphic organizers on it. These are useful to use in any content area when teaching special education since visualization can really help students understand the concepts.