But principals have said they are taking the necessary steps to keep students, staff and families safe.

Marist College Bendigo closed its doors temporarily last week after a parent tested positive.

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Principal Darren McGregor said while the school hadn't heard from the state government in regards to when the recently announced ventilators would arrive, the school was able to keep air flowing in its own way.

"We haven't got any ventilators as yet, we're still waiting for them to arrive, but our open plan design really helps us," he said.

"A lot of our walls are actually able to open up into the environment so we can have very open spaces here while the kids are still inside.

"We've had all our cooling on each day two hours before the students arrive and remains on until after they're gone so the movement of air through the buildings is maximised.

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"We're fortunate that very few of our spaces are the traditional closed classroom that we can ventilate ourselves and we're comfortable our spaces are safe."

Mr McGregor said while the school currently had 97 students and 18 staff in isolation, the school was able to keep running.

"We've set in place a program for the next few days because even though all our year levels are able to come back to school on Friday, we won't have all students back," he said.

"Because those isolating students are in year nine and 10, we will have all students in those year levels working from home."

He said there was "growing anxiety" amongst students as case numbers grow in Greater Bendigo.

"Of course, while it is a concern for all students, it's certainly a heightened concern for our year 12 students," Mr McGregor said.

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"Our year 12s will be here until Friday and that was a significant decision they were involved in making because they've missed so much face-to-face learning through lockdown, they chose to be here until the end of the week."

Kennington Primary School principal Travis Eddy after the school's one positive COVID-19 cases, staff and students were following safety guidelines set out by the Department of Health and Human Services.

"We've been keeping students in spaces the best we can," he said.

"There's been no word to us from the government about the ventilators, but we've been able to keep the air flowing as much as we can.

"It's a bit harder for us being a double story building, but the warmer weather has allowed us to open windows and we've done the best we could with what we have."

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Mr Eddy said patience has been the most important part of getting through the pandemic.

"Everybody is under the pump at the moment and I think patience is the way around it," he said.

He said the positive case recorded within the school had been isolated and wasn't a concern at this stage.

"We're confident all of our tier two contacts are all clear and there isn't going to be any further issues from that particular positive case," Mr Eddy said.

"If another case pops up, we'll deal with it the way other schools are at the moment.

A state government spokesperson said the ventilators were being directed to COVID-19 hotspots before being distributed state-wide.

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"We have more air purifiers getting to classrooms across Victoria every week, focusing on the geographical areas of highest risk first - but that's just one part of our work to make sure students are protected when they get back to school," they said.

"From infrastructure and CO2 audits of schools buildings to more outdoor learning space alongside mandatory masks and vaccination for teachers and older students, we're doing everything possible to ensure that schools are low-risk environments."

The state government is set to distribute 51,000 air purification devices to all government and low-fee non-government schools for higher-risk rooms including staff rooms, sick bays, music rooms and other high traffic areas.

The same schools will all be entitled to a grant of up to $25,000 to purchase shade sails to create more outdoor learning spaces and make it easy for classes to be conducted outside.

Throughout the school holidays and term four, infrastructure audits, ventilation assessments, and CO2 monitoring that has already started will continue in a sample of schools to identify any further actions that can be taken to make schools even safer - and will also cover a number of early childhood education services co-located on school sites.

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