job loss

On my way home today, I got a call from my library job. I have no idea how they got my cell number, but whatever. So the boss lady (and that's being polite) asks me to resign, because I can't make it to staff meetings because of school. I have been nothing but a loyal, hard working employee, and she has this one issue to get at? Until last couple of months, the staff meeting thing was not an issue. My availability was not an issue either, as she chose to only schedule me at her discretion, the high point being one hour in December! This lady is just insane! I told her to just fire me then so I can try to get on with the unemployment! Also, so I can file a grievance with the EOE or whatever it is. Nowhere is it stated that attendance at these meetings is mandatory, also crazy emails the outline, which she reads word for word at these meetings! She said the last time she spoke with me about this and threatened my job that it would be OK if I were unable to attend because I was sick or on vacation, but since I'm in school, that's not a reason approved by her. And She was the one who suggested a lesser position when I tried to quit a year ago! Crazy, Crazy, Crazy!