I'm still trying to work on DH's denial. I wish he could volunteer in the classroom a few times. That really slaps you in the face with it.
Observing in school is ideal, and I do reccomend strongly pushing it. And by strongly, I would say, "Listen, I love you and respect your opinion on most things, but until you have spend at least 3 hours at our child's school observing the daily life, this subject isn't open for discussion."
Alternate - plan a playdate with a few agemates, and get DH's committment to be the chaperone. Suggest that he teach them how to play one of his favorite games, such as chess or monopoly or whatever will give him a chance to get close enough peeks at a normally developing kid to see the beauty of the normal unfolding process. Make sure you are out "grocery shopping" or "getting a facial" during the playdate, and that it goes on 'long enough.' Be sure when you plan the playdate not to invite the two other kids who can somewhat keep up with dear child.
Best Wishes,
Grinity
