Well I'm so cool I read it online, way past what has been released in America
Negima is the story of an english wizard named Negi Springfield who has just graduated Magic School at the age of 10. His final task is to go to Japan to Mahora Academy, and all-girl's school, and become an english teacher to a class full of beautiful and strange girls.
At first, the story is about Negi getting to know his class (with a few ecchi adventures) but as the story progresses, the plot thickens, secrets are revealed, and the action increases. Negi makes several allies as well as opponents along the way.
This manga has also inspired Negima!? Neo- a spin-off manga, two animes (Negima! and Negima!?) several OVAs, a live action series and possibly a movie in the future.
The manga is rated 16+ for a little ecchi and harem. It's general categories are shounen, action, comedy, and fantasy.