The youngest children are returning to the classroom as schools reopen to more pupils across Scotland

Children in primaries one to three are due back in from today along with some senior secondary pupils who need to do practical work for qualifications.

All children under school age in early learning and childcare are also returning.

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While some senior secondary pupils will return, all senior pupils will need to stick to two-metre social distancing within schools and on school buses.

Covid-19 testing will be made available to senior pupils and teachers.

Education Secretary John Swinney has said it is “critical” that parents follow mask-wearing and physical distancing rules at the school gates when younger pupils return to class.

He acknowledged that the Government has little “headroom” regarding the R number – the rate at which the virus grows.

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Mr Swinney told the BBC’s Sunday Show programme: “We’ve all got to play a part, not just the school environment but the whole surrounding environment of society, to make sure that we do all that we can to suppress the virus.

“Because we don’t actually have an awful lot of headroom between where the R level is just now – somewhere between 0.7 and 0.9 – and 1, where obviously the virus begins to spread exponentially.”

Mr Swinney said ministers would be monitoring data carefully when the initial cohort of pupils returns before deciding on whether others could go back to class.

Professor Devi Sridhar, chairwoman of global public health at the University of Edinburgh, told BBC Good Morning Scotland on Monday: “I think we should keep perspective.

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“There will likely be cases emerging in schools over in the next few weeks but the vast majority of schools should be fine and that’s what we have to keep perspective on.”

Prof Sridhar, who is an adviser to the Scottish Government, said: “If you look at the vast majority of scientific knowledge on this, from the United States from across Europe, from East Asia, the view is really that children are not driving transmission.

“They can get infected definitely and they can infect others but they are much less likely to and so if we talk to paediatric colleagues about this they are not finding a lot of asymptomatic infections in children and they are testing quite regularly in hospitals.”