Data released last month by the U.S. Department of Education shows high school graduation rates are improving in Georgia, but continue to fall below the national average. Governor Nathan Deal's plan to take over failing schools suffered a blow earlier this month after voters struck that measure down. Deal's number two -- Lieutenant Governor Casey Cagle -- has his own ideas about how to improve Georgia schools. It's outlined in his new book, “Education Unleashed.” We talk with Cagle about his