School in Schleswig-Holstein started again on Monday after the two-week autumn break.
The mask requirement remains in place for the time being.
According to the Ministry of Education, there is an increased risk of infection because of the many return travelers.
After the end of the holidays, the number of infections had mostly increased nationwide, it said.
Kiel - Therefore, in the first two weeks after the autumn break, it is still mandatory to wear a mask in classrooms and hallways in the school building.
Nobody has to wear a mask in the schoolyard.
Regular tests should also ensure safety.
The government wants to monitor the corona numbers in the first few weeks and adapt the rules to the infection rate.
dpa
