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While preparing students for the school's show choir, Lainey realizes Wilma might be a better singer than her and gets competitive. Meanwhile, Coach Mellor and Aunt Julie fight over how to parent Toby.
Wilma steps in to help CB move on from Lainey with help from Coach Mellor, while Lainey learns she has unresolved issues from her past when mentoring a student.
Cool parent Greg distracts CB from being a good teacher to help his son Weasel receive extra credit, while former Principal Ball is upset at Principal Glascott when he approves the use of Ball's parking spot as a community garden.