There's no question that healthy children learn better, which is why the Healthy and Hunger-Free Kids Act of 2010 went to great lengths to reduce sodium and fat levels in school meals while increasing whole grains and vegetables. But current efforts to roll back nutrition guidelines could negate the progress that has been made.

Want an idea for a hands-on STEM lesson that's guaranteed to fuel student engagement? Hand the kids lighters, and tell them to start fires. Even better (and safer): Invite local firefighters to help out.

Current research examines issues in K-12 education, including digital learning policies, high school student credential attainment, and per-pupil spending in U.S. school districts.