@Chaotic45
Grouping schools and universities isn't very helpful. I suspect a huge proportion of transmission is at universities compared to schools.
There has been mass testing in universities, there hasn't in schools. Doubt they'd dare. The only numbers we see are the symptomatic children and staff, and they're bad enough. The asymptomatic cases are dwarfing the symptomatic the younger you are.
The chunk of outbreaks in education is high, and it isn't split out between schools and universities, but these figures rose considerably as soon as schools went back and before universities did. Many posters were keen to explain it away as a lag from eat out to help out. As there's been mass testing in the dorms they can't explain the figures away so easily.