This site is a sort of online homeschool co-op with a very reasonable monthly subscription fee. You get access to lots of educational websites and an online planning tool, as well as some live online classes (with extra fees, but also very affordable.) They also offer some assessment tools.
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.