Several organizations have banded together to create this platform. At this time, you can sign up to be an "Ambassador" and get further information this fall.
Nice collection of resources and webinar recordings dealing with COVID. While many apply to public libraries, several, especially concerning materials, also apply to school libraries.
One of the best, most comprehensive resources for free materials available online. Check out the live events page! This is a collaboration among several organizations.
More for public libraries, but might be of interest to school libraries. This author combined the information from several sources to write this detailed plan.