You're right, Barb, this is awesome! Thank you everyone! I'll take all the info I can get.

This helps for more than just his exam too. Our daughter is autistic and stopped speaking about 12 years ago. She communicates now with PECS and rudimentary sign, which we are all learning (slowly for me... tricks for old dogs and all... hahaha) so I'll take every bit of teaching I can find. Besides, once we started learning it, it was amazing to find out how many folks are out there who rely on ASL that we can somewhat talk to. It's pretty cool!