This year's ATSSB sax etude #18, measures 25-26 (start of the 6th line), how are you telling kids to play the Bbs in the repeated figure?
Looking only at the repeated Bb/A/Bb/C, I would say side Bb. But they have to jump down to F, Eb, D in between. Are you having kids use bis and flip? Use side and deal with the RH issues? Are you treating the last one any differently since it goes to C after?