Wakakusa Monogatari: Nan to Jo-sensei

若草物語ナンとジョー先生

Nan Harding is the new student at Mr. and Mrs. Bhaer's school. Everyone thinks that she is a pain in the head, but not Mrs. Jo. Together with the other kids, they all embark on their personal adventures and misfortunes while learning in school.

(Source: Anime News Network)