Please suggest me good textures...

Hey, I have just finished modeling my first porject (after some help from few guys around here :)), and I chose materials for my objects but it doesn’t look realistic at all (especialy the walls). Please download this blender file, render it and suggest me better materials for my classroom project.

http://www.4shared.com/file/4358757/b23bb966/_2__classroom.html

Balon,

Here are a few places with excellent free textures:

www.imageafter.com
http://www.accustudio.com

Best of Luck!