Manuel Mathis, a second-grade teacher at Challenger School-Silverado campus, teaches math on Friday, Nov. 16, 2018, in Las Vegas. Mathis won a national Crayola crayons contest, based on a student nomination, that’ll give him a $10,000 classroom makeover and a $1,000 scholarship for the kid. Bizuayehu Tesfaye/Las Vegas Review-Journal @bizutesfaye