A very affordable online math curriculum. Interactive lessons with online practice and tests, plus printable worksheets, and progress tracking. There are placement tests available, and you can purchase a single year or access to the entire program with the ability to change individual student placement at any time. Looks like a very flexible and comprehensive program.
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.