A new study at Seattle School District high schools has found that later start times are associated with more sleep and better performance for students. They are among hundreds of U.S. schools that have pushed back start times, following the American Academy of Pediatrics' guidance to delay the start of middle and high school classes until 8:30 a.m. Still, fewer than 1 in 5 schools comply.

Teachers are proving vulnerable to disconnects between state and federal law that send conflicting messages about the use of medical marijuana. And district officials are in between a rock and a hard place: Under the Drug-Free Workplace Act, any employer that receives federal funding must operate a drug-free workplace, or risk losing that funding.

There was highest number of "major" work stoppages in 11 years in 2018, according to new U.S. Labor Department data. The department reported 20 stoppages, involving at least 1,000 workers last year, with the 553,000 workers involved being the highest in 32 years. The largest event: the Arizona school strike.

Adding coding to the curriculum offers a new way to engage students in learning. Here are some ideas for connecting coding to the elementary curriculum.