There seems to be a LOT of misunderstanding about the data coming from COVID transmission in the school setting.
Yes, data taken over the last half-year suggests schools, particularly K-8, are much less likely to be superspreader events. Schools still certainly can cause outbreaks but are much less likely than, say, a gathering of adults on the WH lawn in which most are not wearing masks. Also, the findings from the international reports state show that transmissions in school are lower IF COVID is contained within the community, IF teachers and staff are required to masks, IF proper social distancing can be implemented through isolated pods, IF teachers can quarantine when cases are detected and the school can stay adequately staffed, and IF schools are operating a decreased capacity.
We obviously need more data, and it's difficult when there is no effort from the federal government to systematically track school openings and COVID cases, but so far the evidence suggests keeping schools open for K-8 in communities in which COVID cases are low and schools can implement measures to reduce transmission (masks, social distancing, operating at a lower capacity, etc).