This story is about Negi Springfield, a 10 years old mage just graduated from the magic school. He is then relocated as a teacher in an all girl school Japan. This is an interesting story in a sense that each individual student in his has a typical manga classification, like savant (fight stay night), vampire (blood/helsing), robot/mecha, martial arts (kenichi), ninja (naruto), shimigami (bleach/kekkashi), power cards (pokemon), magic/mages (mx0/fairy tail), demons, ghosts, and just about every other thing you can think about.
Its kinda like dipping Mx0 into a cocktail of a ton of manga. Also has ecchi/lolli schoolgirls, love, comedy, action and so on.
The main theme for this is still magic, therefore it is `sort of` similar to Fairy Tail and Mx0. Typically most Japanese manga starts off as a single category and in the end the manga would end up with various add ins, like `Magical Robot Building` and `Magical Bikes` in Fairy Tail in which Fairy Tail is supposedly to be based on D&D and medieval (ex: King Arthur period and Robots and Bikes ? WTF ?), or the appearance of robots and demons in Naruto. Therefore it is refreshing that this story incorporates everything from the start rather than changing the theme/category of the story entirely towards the middle or end of the manga.

*More @ Mahou Sensei Negima Wiki |