A very useful site with links to study resources for nearly 50,000 titles. Resource providers include Spark Notes, Cliff Note, Shmoop, Pink Monkey, and more. There are a few paid resources, but most are free.
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.