She started with “Little Shop of Horrors” as a freshman. Sophomore year earned her her first lead in “Alice by Heart.” And now, a junior, Scarlett Livingston is dedicating herself to “Mean Girls,”...

At 5 a.m., most high school students are fast asleep, but Summit senior Landon Egeland is already up and preparing for swim practice. He drives to the pool in the dark and swims for two straight hours,...