From the School Libraries section of the International Federation of Library Associations:
The IFLA Section School Libraries and Media Centers recently added a school library advocacy kit to its webpages. You can find the document here: http://www.ifla.org/VII/s11/pubs/s11_AdvocacyKit.html
In the document you will find links to resources you can use to promote school libraries with you institution, association, or (educational) authorities. The advocacy kit supports the Ifla/Unesco School Library Manifesto and the Ifla/Unesco School Library Guidelines. This document is only a start.
Take a little time to read through the site, and in particular take note of International Research Links and other important statements.
The Alexandria Proclamation on Information Literacy may be accessed here.