The website for the US Environmental Protection Agency has some great free resources for classroom and homeschool use. You can find lesson plans, printables, links to interactive and video content, and much more at this site.
This site has a library of science activities and lessons, plus links to many other websites.
These learning kits on different countries are designed to promote global citizenship.
Self-paced, online coding classes for ages 7 to 15.
This site provides group buys for homeschoolers.
This is a wonderful website from Stanford Math Education Professor Jo Boaler.
This is the organization that publishes Poetry Magazine.