Gintama: Mr. Ginpachi's Zany Class S01E01 - Cram Schools Teachers Say, You Don't Have to Get a 100, 70's Enough.

Principal Hata challenges their teacher Ginpachi to have every student score over 80 in a test otherwise the class faces remedial lessons and Ginpachi gets a pay cut. Ginpachi and his students decide to do a cheating plan.