I think Kari Dunn Barton is not just a pretty good teacher from Minnesota but a pretty incredible, world-class educator for developing the Incredible 5-Point Scale.
I use 5-point scale for more than just children and youth with autism. Although Kari did develop it for children with autism. I use it for anyone of any age who can benefit from self-regulation strategies, like youth with anxiety for any underlying reason. A lot of people are visual learners and these visuals help! One of the best parts of her website, notwithstanding the free downloads, is the Smart Ideas section, along with more sweet scale ideas. The sweet scale ideas really expand the concept of using a 5 point scale successfully for a variety of challenges. http://www.5pointscale.com/