There is hope and excitement for individuals and their families thanks to the kind of advanced programs and comprehensive facilities found at DDI. We understand that education is the gateway to living independently, and starting early is the key. Every small success helps to erase some of the uncertainty that was once part of everyday life. With locations in both Nassau and Suffolk Counties, DDI is fulfilling a vital and unique need for children and adults with autism and other developmental disabilities as well as for their families and the communities they live in.