(Sorry for my slow update=( By the way classes are over =)

Teachers:

Kwon BoA: Math Teacher

Changmin: Science Teacher

Kim Jaejoong: Chemistry Teacher

Yunho: Art Teacher

Ayumi Hamasaki and Micky: Music Teacher

Horikita Maki and Takuya Kimura: Art performance teacher

Professors:

Lee Hyori: Academic Departmment Head Prof.

Rain: Music Department Head Prof.

Namie Amuro: Extra curricular Hed Prof. 

Alumni Student Teachers

Narsha: Cooking Class Teacher

Kim Hyun Joong and Im Yoona: Drama Class Teachers

Yoon Eun Hye: History Teacher

(Many more soon =) Sorry if you don't like whom i picked for each class. It will take too much time you know =D)