Where can I find anger management classes for kids in my area?

I have a kid I work with that could use an anger management class. Something he could do by himself or with me, but in a group setting with other people, preferably other kids. Any ideas or resources? I guess I’m looking for websites or phone numbers – someplace where I can find classes. I live in California; looking for something in or around the Sacramento area. Willing to travel a little bit.