The commitment to include Sam in this classroom is solid. No one is waiting for "evidence" of his intelligence. Everyone believes in him, and everyone takes responsibility for figuring out communication supports.
Reconsider the discipline practices of suspension and expulsion through the SWIFT framework - - preventative, positive, and policy driven.
When one recognizes disability as a mismatch instead of an innate human deficiency, it becomes clear that the solution lies in creating a more flexible, inclusive societal box in which all people are able to fully express potential.