A week after most other high schools in the Lamesa area held graduation ceremonies, O’Donnell High School is conducting its graduation exercises this Friday night. Thirteen O’Donnell High School seniors will earn their diplomas in a 7 p.m. ceremony in the school gym.Seniors will attend to a graduation rehearsal at 9:4 a.m.Ryan Matthew Olivan is the valedictorian of the graduating class and Manuel Chavera, Jr. is this year’s salutatorian, said secondary principal Cody White.