Hi Susan.
I've done that waiting game too. Best to give them the benefit of the doubt, as you are, for the first time it happens. But if it happens again and someone says "can we reschedule?" I would suggest politely stating, "no, actually we cannot. My schedule cannot be changed around and my son's needs are a high priority for me right now. I'll be happy to meet that day with whoever is available in your place if you are unable to attend. Perhaps the principal and/or superintendent can make it?"
I hope your meeting goes off without a hitch. Keep us posted.
