The long-awaited move for youngsters in S1-S6 comes as a new term begins after the Easter break.
Schools have been busy updating parents on plans for a safe return to classrooms after the pandemic had a significant impact on studies as pupils and teachers adapted to home learning.
Measures, including wearing face masks, will be in place to ensure everyone returns safely.
Derek Allan, rector at Kirkcaldy High School, said in an update to parents: “It’s all go from Monday.
“We just want to get on with what we do best, giving kids the best chance to do well for themselves.”
Pupils will need to wear a face covering at all times indoors, and while the 21m social distancing rule don’t apply, the school wants them to avoid very close contact as best they can and respect the distancing rules for adults.
Desks will be cleaned and hygiene protocols in place, with hand sanitiser available at the entrances to school and all classes.
At Glenrothes High School were updated in an email.
It said: “While we will be working closely to ensure that our pupils feel safe when returning to the building, we must bear in mind that this is not yet a return to ‘normality.’
“We must remain vigilant and continue to monitor the risks of COVID-19.
“The safety and wellbeing of young people and staff have been central to all planning, discussions and decision-making as we come together again as a community.”