This site has loads of art projects for kids up to about jr. high age. There are fun videos to show you the process, plus printables to go with them. You can get most of the content for free, but a low subscription price gets you some extra member lessons and no ads.
Saturday Grab Bag
Printable curriculum materials for preschool through second grade levels.
Thursday History/Social Studies
This website from the Government Publishing Office has resources for learning about the US govern
The name of this site says it all!
Tuesday Language Arts
This company provides programs for beginning reading and math learning.
This company publishes three books for helping elementary learners explore science.
Self-paced, online courses for learning coding.