This is one I have talked about before, but am finding more and more usage for. I can take a photo of a tool that a visually impaired kiddo uses and access it through the Skitch app. Once the photo is there, you can draw on the photo, type on it, label parts of it, etc. I have used it with maps too. You can make notes on a map, draw a route, etc. I can imagine it would be helpful in teaching a variety of concepts to non-visually impaired students. It's free!
