These are free phonics learning materials in PDF format. There are flashcards, lesson plans, beginning reader stories, and lots more. The visuals are pretty simple, but effective; and the program looks pretty robust. (A note about religious content: the introductory material for parents is a bit heavy-handed in criticizing current teaching methods. There are also some references to God. A quick look at some of the stories and other resources didn't reveal any blatant religious references, but be cautious if you're looking for secular materials.)
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.