IDAHO FALLS, Idaho (AP) — Clyde Wagnon retired 25 years ago and decided he didn’t like it.So the 90-year-old Idaho Falls resident is going back to school, pursuing a master’s degree in business administration.Wagnon’s first day of classes at Stevens-Henager College was Monday, the Post Register reported. Felicia Little, manager at the school’s College Education Center, says he’s the oldest student they have.But that’s not stopping Wagnon. The former real estate agent and mobile home salesman says he’s looking forward to graduating.—-Contact The Daily Reveille’s News Staff at [email protected]