OpenEd - Open Source Common Core-Aligned Teaching Materials
Check out OpenEd, "The Flipped Classroom for the Common Core," an amazing repository I just learned about for finding Common Core-aligned teaching materials. While it bills itself as for flipped learning, the resources could be used equally well for live instruction. According to the site's About page, it "is the largest K-12 educational resource catalog, with over a million Language Arts and Math games,video lessons, assessments, and courses."
You can use it simply to find resources - searching by broad topics, keywords, grade levels, resource type, and/or standard, or, by setting up a free account, you can build your own "playlists" of videos and other resources or complete courses. All the material is open source, meaning you are free to use and remix it without concerns about copyright restrictions.