FILE PHOTO: Pupils sitting behind partition boards made of plexiglass attend a class at a primary school, during the coronavirus disease (COVID-19) outbreak, in Den Bosch, Netherlands, May 8, 2020. REUTERS/Piroschka van de Wouw/File Photo

COPENHAGEN: Public health official Anthony Fauci warned on Tuesday (May 12) about the dangers to children if US schools are reopened and California's state university system, the largest in the United States, cancelled classes for the fall semester.

As the US debates when to bring children back into classrooms, phased-in reopenings have begun in numerous countries around the world.

READ: COVID-19 - Trump deepens rift with top doctor Fauci on US reopening

Here's how schools around the world are trying to protect children as they reopen:

SOCIAL DISTANCING MEASURES

Denmark eased its coronavirus lockdown in mid-April by reopening schools and day care centres, although concerns they might become breeding grounds for a second wave of cases convinced thousands of parents to keep their children at home.

Teaching staff there are under instruction to keep social distancing in place between children and, with many school buildings staying closed, some teachers are taking pupils outside and writing with chalk on the playground instead of a blackboard.