Also, things may have changed since I was there in the 1960s, but at that time there were only two private schools: Hanahau'oli (which only went up to the 6th grade) and Punahou. Otherwise, it was public school.
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What time frame of the 60's are you writing about? I went to school in Hawaii 65-68 and was at neither of those schools, nor was it a "public" school. Iirc, the Catholics ran quite a few schools.