Frank's nephew Charlie has arrived for another weekend visit to Cackle's. He's fed up with his own school and jealous of the fun the girls seem to have at the Academy, so he persuades his uncle to ask if he can become a pupil at the Academy. The Academy is busy planning celebrations for the commemoration day of their founder, Great, Great, Great Granny Cackle. Miss Drill seems sympathetic to Charlie's request but Miss Hardbroom is dead set against it, despite Miss Cackle wondering if it might not be time for the Academy to go coed. H.B. thinks it's a mistake to have boys at the Academy because it would distract the girls, and Miss Bat thinks boys can't chant properly. In the end, Cackle decides that H.B. should give the boy one of her tests as a way of proving his worth. She gives Charlie a math test, and as he's failing miserably, Mildred comes to his rescue with a spell. It gets out of control and has magic numbers flying everywhere! Charlie's hopes are dashed until Fenella