By Tim Willert Staff Writer twillert@oklahoman.comShawn Sheehan, Oklahoma's Teacher of the Year for 2016, fell short in his bid to be named the country's top teacher. Sheehan, 30, who teaches math to teenagers with learning disabilities at Norman High School, was one of four finalists for National Teacher of the Year, which was announced Thursday morning. Jahana Hayes, a history teacher at John F.