More than 30 per cent of the school had tested positive at some point and it had about 50 pupils home isolating each day.
Nine staff had tested positive and seven had isolated as contacts.
At one stage, five staff had been away for almost two weeks and more than half of staff had isolated for at least one week during the term.
Gore High School had a 29 per cent total infection rate among pupils.
Principal Tara Quinney said the first staff to be knocked out were the cleaners, which left her and her deputy principal cleaning toilets at the end of the day.
Of the 46 staff, 19 had tested positive during the term.
Those left at school were having to pick up slack any way possible.
Rostering year levels off school had allowed staff to manage without too much trouble, but the quality of education for isolating pupils had suffered, she said.
Many pupils had to work off documents uploaded to the internet as there was no capacity to hold classes online as well as in the classroom.
The holidays would give the school "breathing space".
It was unfortunate some pupils and staff would probably have to isolate during the holidays, but it would help things at the school run smoothly, Quinney said.
Kavanagh College principal Kate Nicholson said this term had been the hardest since Covid-19 began two years ago.
The school had an absence rate of 20-25 per cent over the past four weeks.
Throughout the term, 29 per cent of pupils had tested positive and 12 per cent of staff.
"We are all hoping for a much more normal term two."
Logan Park High School co-principal Kristan Mouat said last week it had 17 active cases within the school and 60 total cases since the end of February.
It had a roll of 760 pupils.
The school would continue to monitor staffing and would roster year levels home again if necessary.