Scottish pupils have mostly returned to full-time education - except at schools where coronavirus cases crop up.
Nicola Sturgeon said there is a 'possibility' guidance will change amid a number of cases among students.
First Minister Nicola Sturgeon will update MSPs on schools as well as any further changes to lockdown.
Report says a quarter of the workforce could have lower skills by the mid-2030s if schools do not reopen.
The education secretary will make a statement to the Scottish Parliament on Tuesday.
The Scottish Government has faced criticism over its plans for 'blended learning' when pupils return.
An education policy expert warns gap between richest and poorest pupils could be five times wider by December.
MSPs were told full-time education for all pupils is impossible while two-metre distancing remains in place.
The FM said proposals for at-school and at-home learning will not last 'a single second longer than necessary'.
Education secretary John Swinney says he is 'wrestling' with the issues amid plans for a phased return to schools in August.
Holyrood's education committee has raised concerns over the new grading system to replace cancelled exams.
A new Scottish Government paper says children could return to school 'in blocks of a few days or a week at a time'.