Set up a free PBS LearningMedia account: https://unctv.pbslearningmedia.org/signup/
Then go to the home site here: https://unctv.pbslearningmedia.org/
Information can be found by subject and/or grade level. There is also a multilingual section (5 world languages) under the subject heading.
You can go here for PBS free contribution of PreK-12 Resources for Emergency Closings: https://unctv.pbslearningmedia.org/collection/emergency-closings-collection/