Not sure kids play a large part in spread as their immune system seems to squash the virus quite easily and minimises the risk. Also a recent study in the US showed teachers are no more likely to get covid than the general population (probably because they work with the safest cohort).
Some more info
https://www.cidrap.umn.edu/news-per...tudies-highlight-low-covid-risk-person-school
https://www.healthline.com/health-n...r-10-unlikely-to-spread-coronavirus-at-school
https://adc.bmj.com/content/105/7/618
