This organization has a lot of materials on Asia, though that is not their sole focus.
http://www.primarysource.org/
And they link to "China Source" which they share with Harvard Asia Center.
http://www.primarysource.org/onlinecurriculum and http://www.primarysource.org/chinasource
You will need to request a password for access to this part of the website.
edited by abrown on 5/5/2013
Without the password, there are tons of great teaching resources such as this one about "What is Modern?" which compares Europe and China.
http://afe.easia.columbia.edu/chinawh/
edited by abrown on 5/5/2013
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