Mathlete's Feat When a modernized Springfield Elementary has a technical meltdown, Lisa transforms it into a Waldorf school. Meanwhile, Groundskeeper Willie becomes the coach of the mathletes. Details Casts Title Mathlete's Feat Genres Family Animation Comedy Release Date 2015-05-17 Episode Runtime 00 Hours 22 Minutes Season Number 26 Episode Number 22 Production Companies Gracie Films, 20th Century Fox Television, 20th Television Animation, 20th Television Dan Castellaneta Homer Simpson / Abe Simp? Julie Kavner Marge Simpson / Patty Bo? Nancy Cartwright Bart Simpson / Nelson Mu? Yeardley Smith Lisa Simpson (voice) Hank Azaria Moe Szyslak / Chief Wigg? Harry Shearer Ned Flanders / Mr. Burns?