This British site has resources for history learning at jr. high and high school levels. There are some resources available for free, but most require a subscription (reasonably priced.) Resources include printable worksheets and information, powerpoint presentations, short videos and more.
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.