You posted a link from april on the school experience in Australia, a country that has had a tiny fraction of the disease compared to here.
Okey dokey, how about we compare schools in Sweden vs Finland. Sweden never closed their schools, never locked down, didn't use masks.
Finland closed their schools for 2 months, locked down, advised use of masks.
Sweden was hit hard by covid 19, with 7300 confirmed cases per million, not quite as high as USA or Brazil but definitely among the highest worldwide.
Finland was not hit too hard, with 1300 cases per million.
So if open schools were very risky, you would expect lots more school age cases in hard hit Sweden where schools remained open, than in Finland where cases were six times less and schools actually closed for 2 months.
You'd be wrong.
Here is a report produced jointly by the Public Health agencies of Sweden and Finland.
There were ZERO deaths from covid 19 in both countries for students aged 1 to 19
Covid 19 case incidents per 100,000 students was 52 in Finland and 49 in Sweden.
https://www.folkhalsomyndigheten.se/...d-children.pdf
So that's as real world as you can get, actual data, no BS theories or modeling whatsoever.
If you are worried about teachers, scroll down to table 4. Out of 293,038 day care, primary, and secondary teachers in Sweden, 381 have tested positive. Since their average age is between 45-50 very few of them died, and it would be wrong to assume they all caught it while teaching. Anyway, according to Sweden case stats, teachers are among the lowest risk profession.