Where do one find good websites for health education?

Of publications in the Internet but credible

Official govermental and federal agencies like WHO (World Health Organizations)

CDC (Center for Disease Prevention and Control)

AHA (American Heart Association)

ADA (American Diabetes Association)

P.E Central: If you are interested in physical education, you can visit this community for lesson ideas, videos and interaction.

Health Teacher: This is a great community that focuses on bringing community education to more people, and offers access to teaching resources.

I did not understand the question phrasing...

what do you mean by "where do one find ?"

Google search can provide a number of choices of the websites on different topics but to select one with accurate information needs analysis of the content.

A good Boolean search can provide some useful answers. 

https://en.wikipedia.org/wiki/Main_Page