The Georg Eckert Institute conducts applied and multidisciplinary research into textbooks and educational media related to textbooks, informed primarily by history and cultural studies.
One of the most important research institutions in the field of textbooks. In addition to a large collection of textbooks, ...
Edumeres is a Virtual network for international textbook research.
Very important the curricula workstation (filtered for Country, Subject, Education level, Date): http://curricula-workstation.edumeres.net/en/curricula/
The site has 4 sections:
News: Current issues in educational media research
Reviews: ...