This site contains downloadable materials that are used as math and language arts curriculum in New York public schools. There is a lot of information on standards and classroom pedagogy that can be a bit intimidating to wade through. But it may be worth the effort if you want to stay aligned with standards. Plus, it's a free and complete 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.