It is about 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.
For the most part, it is pretty similar to the original manga series.
Negi wears a wrist bracelet (which was supposed to be his fathers)
Sayo is introduced much earlier in the series than in the manga or first anime.
In the manga, Takahata can't use magic. In this new series, he's a mage.