My copy of the first volume arrived yesterday, and so I scanned the front/side/back along with the inside flap with a comment by the author. I wish I could scan the extra stuff (the author also has a comment page for each chapter, plus there's a page that shows the layout of the Sket-dan clubroom and a profile for Bossun) but I don't really know how to scan those without actually taking apart the book, which I don't want to do.
Here's the cover: http://i3.photobucket.com/albums/y81...a/fa296b62.jpg
According to Japanese Wikipedia, the artist for Sket dance Shinohara Kenta used to be an assistant to Sorachi Hideaki (Gintama) himself! No wonder they both share the same sense of humor! This also totally makes me understand the Gintama vibes I get from this series.
Koukushi Musou!! (Weekly)
Nejimaki Kagyuu (Weekly)
Hitoribocchi no shinrakusha (Monthly)