LITTLETON, CO - FEBRUARY 22: Liah Engelbert, 10, left, and Julia Alvarez, 10, work on a fourth-grade math project together inside the newly renovated library equipped with "cloud ceilings" that improve lighting and help with the acoustic value at Runyon Elementary School on February 22, 2017 in Littleton, Colorado. Littleton Public School put thousands of dollars into renovating Runyon Elementary School, including adding a new roof. The district views it as a model project for how to preserve an old building for the future instead of starting over. (Photo by Kathryn Scott/The Denver Post via Getty Images)
