This article,
Mount Vernon schools dismiss 'mock slave auction' teacher, seek 'breach' in hiring process (link), about the firing of a teacher for holding a mock "slave auction", and about her hiring in a nearby school,
New Job for NY 5th-Grade Teacher Fired Over Mock Slave Auction Sparks Protest (link), focuses on the use of demonstrative history techniques. It seems that the uproar cost her her new job as well as that of the official hiring her. She now tutors.
This raises the question; why does society have to walk on eggshells? Nothing she was teaching wasn't true.