I had noticed that the amount of commentary on school activities had dropped substantially in recent months, and knew that both kids had been sick...and that made me wonder if either or both of them were running hard up against the state minimum attendance requirements (the consequences of which would be disastrous for both of your children).

As for your MAPP test comment - yeah...
Sadly, it's becoming a year-round deal down here, because the state test results are a major part of our school district A-F rating system (don't get me started on that one), and the high school versions are part of the state graduation requirements (concept is better, but the tests still suck).

I'm sorry that parts of your local public school system chose to take an adversarial attitude about your situation, and wish you and your family the best with your renewed home-schooling efforts.