This company publishes five sets of ebooks for learning to read. The books are reasonably priced, and there are some free worksheets to go with them. The company also donates a book to a child in need every time you make a purchase.
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.