[quote]
Originally posted by: Kale Ironfist
in the anime and the manga, kiba relives a day in the academy. most of the students have moved up a class, and naruto is there and is not really known by all the students. that makes it seem that you have to prove yourself to move up a class, and naruto has been in the same class for a long time. it also means there are many different classes of students.

Either that or Naruto just transferred to another class, maybe cause he was giving a kid too many problems. Just a guess.