Azumanga Daioh

16, "A Fun Profession" We meet Kimura-sensei, the girls' creepy Classical Lit. teacher. 17, "Pool, Pool, Pool" As the girls gather at the school pool for gym class, we get to see more of their physical limitations, as well as a few personality quirks. 18, "Ribbon" Nyamo is trying to teach swimming technique to her class at the pool, when Yukari (naturally) rudely interrupts. 19, "Just the Two of Them" At Yukari's insistence, she and Nyamo face off in a pool relay race. 20, "A Good Person?" The aftermath of the class relay race. Also, the girls spot Kimura in the park after school and start wondering what kind of person he really is.