CAST has developed a wonderful website on universal design for learning. It offers a terrific guide to developing lessons in a way that will be accessible and engaging for all students.
In this book, Dr. Teri James Bellis, one of the world’s leading authorities on auditory processing disorder (APD), explains the nature of this devastating condition and provides insightful case studies that illustrate its effect on the lives of its sufferers.
There are many websites and software programs that can calculate readability for you. For shorter pieces of text, you can use one of the many online readability programs available listed below.