This will get added to on a regular basis, so be sure to check back for more resources!
Art:
https://createca.org/createathome/
A library of many resources across all content areas (math, science, reading, etc):
https://docs.google.com/document/d/1SG3pokpvi-W3QpkwdCKCZBpBR-NAww7noy6OyGM-0FI/edit
Orange County Department of Ed Resources:
https://ocde.us/ito/Pages/Resources.aspx
5 Free Ways To Keep Your Kiddos Occupied When Working From Home (LinkedIn Article):