Ranger is a Tail Waggin' Tutor now. He started that job today. Knowing that it was a new thing we were asking of him to sit with one child and listen to a book rather than socializing with every kid he sees I'd brought along some treats to reinforce what I wanted him to do. At one point when he was getting a little restless he looked pointedly at where the treats were hidden and then looked at me and signed food. He got his treat.
Later when our Schwans delivery guy came, Ranger who adores him, rushed out to meet him, sat and signed food clearly asking for the treats he knows are coming. I'm encouraged that Ranger is using the sign in context to ask for what he wants.