Without set standards, teachers develop own 9/11 lesson plans

Friday, September 2, 2011 | 8:37 p.m. CDT

WASHINGTON — Ten years after terrorists crashed planes into the World Trade Center and the Pentagon, the profound impact on the United States is not hard to see, from heightened domestic-security measures to the nation's role in conflicts deemed part of a war on terror. What’s less obvious is how the attacks have filtered into American classrooms.

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