http://pinterest.com/scsdmedia/schoo...d-furnishings/
Kind of a broad question. Are you asking about layout? furnishings? books? media? When I was a kid, the library was cases of books in a room with tables that comfortably seated adults or kids. That was well received.
Libraries aren't special. Go to other schools and see what they have done. If something appeals, copy it. Some considerations here...
http://www.ehow.com/how_5079514_desi...l-library.html
Some ideas here...
http://www.bcieurobib.com/projects/
http://www.ncef.org/rl/libraries.cfm
http://americanlibrariesmagazine.org...-super-schools