Hmm, Jr. High perhaps??? Johnny Red Kerr attended High School at Tilden Technical, was a class mate of my fathers. Tilden was an all boys school near Midway Airport. Dad was on the Wrestling team, their pre season work out was with the Basketball team due to seasons coinciding. Pop's knew Johnny fairly well. Think either you're grandmother or my father was lying. Heh. Hmm, wonder if he transferred into Tilden. Back in the day, Dad said Tilden won all the boys state championships. 1200 boys split even down racial lines. Fight a day, Dad would say. Can't ask him now as he passed two years ago. Wikipedia states Tilden was all boy from 1918 until the 1960's.
My memory of my conversations with dad are a little vague now, he had alzheimers for 10 years or so before passing, so my lucid convo's are from long ago... But, I think he mentioned that an all girls Catholic school was located near by Tilden, and that the dating scene between the two schools was... "healthy". Perhaps that is the connection?