Facts about the Mississippi River are highlighted. Journalist Boyce Upholt talked about his experience traveling on the river.

Douglas Branson, author of "Washington's Lieutenants," talked about the leadership structure of the Continental Army during the American Revolutionary War.

Physical activity breaks in the classroom can help ramp up student fitness and increase attention—or turn into a chaotic hassle that teachers work to avoid. Fewer than 9 percent of school-age children ...