I don't know where this classroom is located, or whether it represents a Swede School. "Sweede school" is mentioned in the message on the back of the postcard: "Harold wanted to send this to you he started sweede school this morning."
This photo looks like a regular school classroom with the children wearing their Sunday best clothes. I am not sure whether all Swede Schools took place in the summer. Maybe this photo was taken at the end of the regular school year, and Swede School started in the summer after the end of the regular school year. It probably is safe to assume that Harold is one of the boys in the photo. If I had to guess, I would say that Harold is the proud-looking young boy with the suspenders in the front row.
The book Swedes in Minnesota, by Anne Gillespie Lewis mentions summer "Swede schools" and reports that he Swedish language was still being widely used in Minnesota Swedish-American churches and Sunday schools in the early twentieth century. Another one of the few references to Swede Schools found online is this in an article The Immigrant Church As A Symbol Of Community And Place In The Upper Midwest : "The church tried to combat the erosion of language and culture through the maintenance of a "Swede School" and seriously pursued the goal of full attendance among the young."
There is a photo of a summer Swedish School class in the Swedish language taken at the closing program in July, 1910 on the Minnesota Reflections website here.
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