How is social distancing implemented in classes with 30 children?

The school will to the furthest extent possible implement social distancing. However, according to Folkhälsomyndigheten schools are not believed to be driving in spreading the virus. In most cases where children have caught the virus they have been infected by an adult and their symptoms are mild. Also, school staff has not been diagnosed with Covid 19 to a higher extent than other occupational groups.