The teachers who work with DD & autistic children in our schools use it for scheduling, communication, and lots of other ways too. Our speech therapists also use it and swear by it. It's a computer program with icons and related text, but from what I've seen, it's VERY versatile. Might be something you could use in your situation? I think it's pricey, but not when you really use it to it's full potential. I guess you could do an online search for it, if you are interested. Its also possible that your school district may already have it, I would definitly look into it.
Good luck & God Bless!