I don't know how it is where you are, but quitting is really their only option here. Non-renewal is really a kiss of death for your career. As I wrote here and here, non-renewal in Georgia is a career killer. (The young teacher is applying for a teaching job again and not having any luck).
So, what if some of those 178 are really innocent of the charges against them? In this witch hunt, how would you prove you hadn't cheated, that the wrong-to-right erasures were the students own doing?