AFB and Perkins have joined forces to ensure the Expanded Core Curriculum (ECC) is taught in mainstream schools. This website is a terrific resource for parents who need to know exactly what the Expanded Core Curriculum is and how it's supposed to be implemented on an IEP and in the classroom.
You should definitely check out the Expanded Core Curriculum Subjects and Skills page. This page lists all the areas of the ECC (which we've all seen before), but also goes into each subject in depth and explains why and how they should be taught. They even have a special section dedicated to Children with Multiple Disabilities.