When Martin Luther King Jr. was killed in April 1968, one teacher in a small town in Iowa decided to do something to help her students fathom the shocking event. She understood, more than most, the power of good teaching. Her lesson plan rocked the nation...

"One winter semester during college in upstate New York., I took an 8 AM history class to fulfill a requirement. It was hard to get up for that class, but about 15 of us met 3 times a week to brave the cold winds and trudge to that lecture in a...