King of the Hill - Season 8 Episode 13 -

Peggy volunteers to help with the school cheerleading squad, in order to get them to learn some cheers to motivate the football team. Up until now, the squad is only concerned with winning the dance competitons and trophies from other schools. When Peggy gets the crowds behind the team, the school principal replaces the current coach with Peggy....who takes it too far.