Education secretary John Swinney has insisted it is “safe” for children and teachers to be in school this week – despite the Scottish Government moving classes for most youngsters online in January.
The school Christmas break is being extended to January 11 for the majority of pupils, with remote learning then being in place until January 18 at the earliest.
Swinney said he would “want to stick” to schools returning to face-to-face learning after that.
But Larry Flanagan, the general secretary of the EIS teaching union, said that would depend on the prevalence of coronavirus in communities across Scotland.
The extension of the school break and the move to remote learning for all but vulnerable youngsters and the children of key workers was announced by First Minister Nicola Sturgeon as part of the response to a new, faster-spreading strain of Covid-19.
Those measures will see all of mainland Scotland put under the toughest coronavirus restrictions from Saturday December 26
Mr Swinney told BBC Radio Scotland that ministers were taking “a strategic approach in the country to try to minimise movement so we maximise our chances of avoiding further spread of the virus”.
His comments came as Scotland’s Children’s Commission Bruce Adamson said he remained “deeply concerned” that online learning can be “inconsistent” across the country, with a lack of national guidance and support from Scottish Government.
He added: “Ministers continue to have the ultimate responsibility to ensure children’s rights to education and mental and physical health are realised.”
Swinney said keeping schools open for children had been the government’s “highest priority” since classes resumed in August.
However, teachers unions have criticised ministers for keeping schools open this week, with classes in some parts of the country continuing until Wednesday December 23
Mr Flanagan told BBC Radio Scotland: “For those schools that are still open this week, we think remote learning would have been a better option.”
However, Swinney said that coronavirus cases in Scotland were still comparatively low compared to the rest of the UK, saying there were 115 cases of the disease per 100,000 people here against 625 per 100,000 in Wales and 467 per 100,000 in London.
The education secretary said: “We have, compared to the rest of the UK, very significantly lower levels of coronavirus and our schools are safe.
“So young people and children should go to school this week.”
Swinney said he had taken the “difficult decision” not to change the arrangements prior to the start of the Christmas break “for exactly the reason the Children’s Commissioner has set out, that loss of schooling and interaction of that type is damaging for children and young people and that is the strongest public health advice we have got”.
He said: “We want the schools to be back into face-to-face learning on January 18.
“Remote learning will start on January 11 for pupils, and for vulnerable pupils and for the children of key workers, they should go back to school when the schools are scheduled to reopen in their locality.
“I want to stick to January 18 and we will be reviewing the situation as we go into the new year, to monitor the cases, to look at the evidence in front of us and to take the right and appropriate decisions to make sure our schools are operating on a safe basis.”
The Scottish Conservatives said parents were being “left in the dark” over plans for children to return to school.
Shadow education secretary Jamie Greene said: “While everyone accepts the situation surrounding coronavirus is a moving picture, the SNP government are leaving parents in the dark over what will be happening in the new year.
“Little detail has been given as to why education has been put on hold and how on earth parents are expected to work when their childcare options have been taken away.
“There is no good reason why all pupils cannot return to some form of learning from January 5 as was originally planned, more so given the huge loss of teaching that so many have already suffered.”