Saotome is the homeroom teacher for class 1-B and is also the physical education teacher. He is often highly energetic and enthusiastic, but due to this he also often makes a scene in front of his students. He is almost never seen without his jersey. Rebecca once teased him about the fact that &quot;it must be great to be a PE teacher and see high school girls in their gym uniforms all the time&quot; trying to imply some other side of Saotome's personality, though this is never confirmed.    (source:Wikipedia)

The 11 year old Miyamoto Rebecca becomes the new teacher of a classroom which is full of weirdos. Despite her cute looks she's a little beast and can be pretty sarcastic and offensive. The school is not safe anymore now that she's in charge of a class and her students, Himeko, Ichijou, Rei and a white rabbit who took a liking to Rebecca help her to rough up the school and the neighbour-class with its teacher "ojii-chan".
 
(Source: Anime News Network)

Rebecca Miyamoto is a child genius with a Ph.D. from Columbia University, and she is starting as a high school teacher. The students love to tease her from day one, and she doesn't behave much better. Now we follow this class as they strive to get better grades and cope with their new teacher. 
Chapter count includes 22 bonus chapters