The use of face coverings in corridors and communal areas of secondary schools is set to be introduced in Scotland.
The government is in the “final stages” of consultations with teachers and councils about having pupils wear face coverings while moving between classes.
First Minister Nicola Sturgeon said she was acting in response to new guidance from the World Health Organization.
Ministers are also considering whether to make masks mandatory on school transport – but not inside classrooms.
The use of face coverings in schools is currently voluntary, although some schools have started advising staff and pupils to wear them to help combat the spread of Covid-19.
Young people returned to Scotland’s schools earlier in August with no requirements for physical distancing between younger pupils, and no rules around face coverings.