File—File picture taken Aug.4, 2020 shows students from Lagos State Model School wearing face mask to protect against coronavirus attend lectures inside a class room in Lagos, Nigeria. Nigeria officials resumed both public and private schools on Monday for students following months of closure to curb the spread of coronavirus. As Germany’s 16 states start sending millions of children back to school in the middle of the global coronavirus pandemic, those used to the country’s famous “Ordnung” are instead looking at uncertainty, with a hodgepodge of regional regulations that officials acknowledge may or may not work. (AP Photo/Sunday Alamba, File)