"I did my country school placement as a young teacher in Ohakune and then we came back to Whanganui and I taught at Castlecliff, Aranui and Kokohuia schools before I came to Durie Hill," Mr Dewson said.
Working at the same school for 41 years and a term had given him some wonderful memories, and he had met many children whose parents were once in his class.
Dave Hiroti is a Durie Hill parent who once enjoyed being in "Mr D's" class. "He has always been a great teacher who sets everyone up to flourish," he said. "The school has been very lucky to have him for so long."
Mr Dewson said he had good memories of the outdoor education programme he instigated at the school when he started teaching there in 1976.
"The camps at Mangatepopo in Tongariro National Park have always been a highlight of the year and I feel very proud that I can still walk to the top of Tongariro," he said.
Durie Hill students performed a waiata and a haka for Mr Dewson before his Room 1 class escorted him to the "holiday house with wheels", as he describes it, and the rest of the school lined the roadside to wave farewell. Each student had decorated a large paper hand to wave as the van moved off and Mr Dewson tooted a selection of horns he had on board.
"This is farewell but not goodbye," he called as he drove away.