Justin Roberts doesn’t think it’s all that unusual that he went from being a Montessori preschool teacher to a Grammy-nominated musician. The Chicago-based singer-songwriter wrote intelligent, catchy songs to sing to his young students. Roberts has consistently made Amazon.com’s Top 10 Children’s CDs of the Year list, and performed his music on the “Today” show and Nick Jr. His single “Get Me Some Glasses” also was featured on a World Series broadcast. He’s currently touring with his band, The Not Ready for Naptime Players, to promote his latest album, “Recess.”