After hundreds protested last week as a Department of Education board moved to close 19 under-performing schools, the teachers union and NAACP are filing a lawsuit to reverse the decision. The union will argue that shuttering the schools violates state law because the decision fails to consider impact on the community. The NY NAACP signed on because the closures will hurt minority students, reported AP. But Mayor Bloomberg and Schools Chancellor Joel Klein are fighting back—they say the closings are warranted because the schools just aren't performing.