Proper Japanese Title: スケット・ダンス (Suketto Dansu) - is a manga series that is originally created by Kenta Shinohara. It first ran in Shueisha's Weekly Shonen Jump on August 28, 2006. Then on November 2, 2007, Shueisha released the first tankobon volume. Sket Dance ended with a total of 288 chapters and 32 volumes. None of these volumes have been published in North America or Europe.
A Taiwanese edition published by Tong Li can be found here.