I recommend that you request a meeting of the parent-teacher association and the special education parent council and hold a forum on this important issue. If necessary, encourage fund-raising or grant searches that support your school's professional development efforts around inclusion. Invite guest speakers who are experts on inclusion to speak to teachers and administrators and implore your superintendent to authorize a study that measures the impact and success of the inclusion program as formulated in your town.
In the meantime, make sure that your son's IEP contains guidelines for teacher behaviors, includes resources about CAPD for them to read, and makes specific mention of how your child's performance will be evaluated and how he will be graded. The myth of inclusion is expressed in the often-heard comment that "all kids are special." In truth, some are more special than others and a "one size fits all" approach will just not work.