Mary I have been a teacher of autistic children for the past 6 years. I have mostly worked with middle school aged students in a self contained classroom. One of the biggest challenges I have to work with is children that don't know their letters or numbers. I have always believed that this is a very important concept that would allow my students to do much better in many areas of their lives. I have struggled for yeatrs adapting special ed and regular ed materials in order to teach my students. I decided to write my own workbooks for letters and also numbers. I really believe that these workbooks can make a difference in the lives of many children with Autism. Please check out my website and read about the workbooks. Feel free to cntact me through the site if I can answer any questions for you. Thanks www.room52publications.com