Some of these may be a little mature for your child, and I find social skills encompasses such a large field that maybe I am missing the mark on what you want, but I have had some success with WatchWellCast videos. Some (puberty, abusive relationships, suicide) are clearly geared towards older kids. However, they have some on things like positive thinking, making friends, stopping negative thoughts, which I plan on sharing with elementary aged kids. I hope that helps!

For 11-yo DS who needs to be taught to "get a clue!"