This behavior chart I use on my students desk as a visual reminder for the progress of their day. I highlight/color the faces happy (green), ok (yellow) and sad (red). I also require the student take it home that day and return it to me the next day signed. This way I have another documentation for the students behavior when I need it.
Easy, break down of the day to easily earn.
Look out for the updated version down the road for larger increments of time.