I would highly recommend "Nobuta wo produce" (a classic).
There are also :
- 35 sai no Koukousei
- Saki ni Umareta Dake no Boku (from the teachers' point of vieuw)
- Ashita no Yakusoku (also from the teachers' point of view)
- Aogeba Toutoshi
- Cat Street
- Gakkou no Kaidan
- Gokusen (aslo a classic), several seasons
- Gommenne seishun!
- Kasuka na Kanojo
- Kingyo Club
- Long love letter
- My Boss, my Hero
- Nazo no Tenkousei
- Omotesando Koukou Gasshoubu
- She
- Stand Up!
- Stawberry on the Shortcake
- Suzuki Sensei (from the teacher point of view)
- Taiyou to Umi no Kyoshitsu
- Tumbling (highy recommended too)
- Water boys
- Yamada-kun ot 7nin no Majo
- Yamada Taro Monogatari
- Yankee-kun to Megane-chan
- Yowakutemo Katemasu
- Yukan club
and many more I have forgotten or not watched.
Different genres, so you'll probabaly find something you'll like.