As part of a template that Kevin Shepard and I created to allow teachers to build their own Health and/or Physical Education website, we included a page with tons of resources, many of which are health related. You can find that page here: https://sites.google.com/site/physedtemplate/resources-for-students

In case you are interested in creating your own website using our template, please see our post with all of the information: https://www.cbhpe.org/idea-tank/elementary-pe-idea-tank/create-your-own-school-website