Jerry Wood was a teacher.
Jerry and a female teacher were on a picnic with some children near the church when it caught fire. When Ponyboy and Johnny ran into the church to save the children which were playing in there, he tried to stop them from going in, but was "too fat" to get in through the window. Afterwards, he couldn't thank the boys enough for risking their own lives to save them, and considers them heroes.
Jerry lives in the country and apparently had never heard of the Soc/Greaser conflict before hearing it from Ponyboy. He doesn't believe teenagers should smoke, calling Ponyboy "too young" when he pulls out a cigarette in the waiting room. Jerry also is guessed to be married since he was wearing a ring when at the hospital with Ponyboy. Jerry Wood also stayed with Ponyboy during the ambulance ride.