Teaching High School kids in a behavior classroom

I am considering teaching knitting to a group of teens who are in a behavior classroom. These kids are in this classroom because of behavioral or emotional issues and were not successful in a general education program. They are bright kids, but maybe a little tough to sell on the idea of knitting. My thinking is by helping others and finding a place to donate their knitting they can really help themselves. I have taught knitting to very young (very eager) students, but never high school age kids. I am a little unsure about how to get started. Does anyone have experience with a similar situation? Any advice or suggestions would be greatly appreciated. Thanks so much.