Billy's Little League team loses 99 - 0 against Mindy's team. Although Mandy is an exceptional baseball player, Billy continues to insist that girls are not allowed to play. Grim comes up with a plan to get Mandy on the team: he simply puts Mandy in a baseball uniform and introduces her as "Manfred." Billy falls for it.
Principal Skinner hosts a diversity forum that discusses the different perceptions of men and women in core academic subjects, more specifically math. The forum goes astray, and Springfield Elementary gets a new principal that feels it's best to separate boys and girls in order to provide the best math education to each group. She develops this opinion based on stereotypes of boys and girls.