So, what corroborating information is there? How do we know that’s him?
My own wife and kids can’t pick me out in my junior high pictures.
The Maui News initially published a story on the teachers. Note that the teachers say in the article that "Her supervising teacher was Kazuko Sakai, the primary educator for about 25 students in a kindergarten class that included a boy named Barack "Barry" Obama." You can clearly see the writing "Miss Sakai" on the bottom right of the photo.
Also, I don't think there were that many black kindergartners in Hawaii in 1966, but I could be wrong.
-PJ