历史老师讲美国过去的历史。因为过去的历史包含种族歧视，这位该校最好的老师也被
怀疑有种族歧视。被带薪休假。
A southeast Michigan public school teacher has been removed from the
classroom while district officials look into whether a lesson plan on
African-American history and racial segregation laws was inappropriate.
...
"It had nothing to do with racism. History is history," Aaron told the
newspaper. "We need to educate our kids to see how far we've come in America
. How is that racism?
"It's so sad this has happened to him. He's one of the best teachers we've
had." http://www.foxnews.com/us/2014/05/31/michigan-teacher-suspended
