The lengths that charter schools go to when their teachers try to form unions.

Ninety-three percent of charters are non-union. This is part of their business plan. Teachers work long hours and turn over frequently. This keeps costs low.  Sometimes charter teachers try to form a union. The management fights them, as big business did decades ago. This article in Salon  shows how "charter management fights unions by intimidating teachers, even calling in cops. Teachers have no rights." So interesting.