If you're looking for anime similar to Gakkatsu! 2nd Season, you might like these titles. All recommendations are made by Anime-Planet users like you!
The story revolves around Kibayashi-sensei, a teacher of the occult whose hobby is speaking with the dead and whose special talent is exorcism. Kibayashi-sensei knows everything about the other world, but nothing about our own world.
Both shows are quirky and super fun with their characters and what goes on inside the classroom. Both have short episodes and a similar animation style too. If you like comedy shows that can be super serious yet completely not serious at the same time these 2 shows are for you.