The ladies rehearse their classical dance in the school gym while the school board practices their quartet ("It's You") for the ice cream social. Marcellus and the town's teenagers interrupt the ladies' practice, taking over the gym as they dance ("Shipoopi"). Harold grabs Marian to dance with her, and all the teenagers join in. Regarding Winthrop's cornet, Marian later questions Harold about his claim that "you don't have to bother with the notes". He explains that this is what he calls "The Think System", and he arranges to call on Marian to discuss it. The town ladies ask Marian to join their dance committee, since she was "so dear dancing the Shipoopi" with Professor Hill ("Pick-a-Little, Talk-a-Little" ). They have reversed their opinions about her books, and they eagerly tell her that "the Professor told us to read those books, and we simply adored them all!"