This is a complete phonics program with lesson book, over 50 progressive readers, teaching songs, and other activities. There are no samples available, so it's hard to tell how advanced it gets. Looks like a pretty comprehensive program at a fairly reasonable price.
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.