Serendip is an independent site partnering with faculty at multiple colleges and universities around the world. Happy exploring!
Remote Ready Biology Learning Activities has 50 remote-ready activities, which work for either your classroom or remote teaching.
More information about coronavirus risk
Another source that explains why people in the US are at substantial risk is
https://www.npr.org/sections/goatsandsoda/2020/03/12/814522489/singapore-wins-praise-for-its-covid-19-strategy-the-u-s-does-not.
As you probably already know, https://www.cdc.gov/coronavirus/2019-ncov/index.html is a good source of information and advice.
Wishing you good health,
Ingrid