The Bell Will Toll an Hour Later for Sleepy Teens in Minn. District

As the mother of two daughters, Kathy Casmer knows how tough it is to get teenagers out of bed early in the morning.

And as a school board member in Minnetonka, Minn., she worries that dog-tired adolescents aren't at their academic best at 7:15 a.m., when the first bell rings in the suburban Minneapolis district.

So the school board came up with a compromise. In the fall, many families of high school students will be able to choose between the current 7:15 starting time and...