Education collections
Education eResources, State Library NSW
Parliament of Australia, Parliamentary Library, Education and Training Resources Guide

Educational research databases
The Cunningham Library holds a comprehensive and up to date collection of educational research documents in Australia. It has some freely available data bases.
ERIC (U.S. Department of Education) provides descriptive abstracts of over a million journal articles and ERIC documents—research reports, conference papers, curriculum guides, and other materials—that are not formally published otherwise. 

Collections for teachers
The Educator's Reference Desk 

General collections
State Library, NSW 
Australian National Library (Trove)
UNESCO World Digital Library
USA Library of Congress