We're still in a COVID19 Pandemic (especially in the US), so unless the safety of teachers and students is guaranteed, skip school.
South Korea Study
https://www.nytimes.com/2020/07/18/health/coronavirus-children-schools.html
Inmates Get more time outside than students
https://fee.org/articles/inmates-spend-more-time-outside-than-kids/
E learning study
https://msutoday.msu.edu/news/2020/ask-the-expert-online-learning-vs-classroom-learning/#:~:text=A%3A%20Online%20learning%20can%20be,has%20to%20be%20done%20right.
https://pubmed.ncbi.nlm.nih.gov/20041922/
Safety Measures That Work
https://edsource.org/2020/safety-measures-in-schools-across-globe/634801