Starting next week, the province said they will need to be tested weekly and show proof of a negative result.
Lecce added the province has been working to minimize outbreaks in Ontario schools and will continue to build on the progress of the back to school plan and will continue to work to ensure students can still attend class every day.
A total of 139 people have died of COVID-19 in the past week.
The idea of extending the annual break was being considered as a way to impede the spread of COVID-19 in the province, but Lecce announced Wednesday that after consulting with health officials it wasn't deemed necessary.
Harvey Bischof, president of the union representing Ontario English public high school teachers, said he would prefer a period of school closures after the Christmas break rather than expose educators and students to excessive risk.
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Friday's additional cases brings the total of infections reported to date in the province to 100,790.
"As it's looking, these measures, they will have to be tough in the hardest-hit areas", said Mr. Ford, who also announced a COVID-19 enforcement blitz aimed at workplaces on Thursday.
Of the cases reported by the province today, 346 are from Toronto, 361 are from Peel, and 143 are from York Region.
Both the number of active cases and the number of people now hospitalized has decreased from yesterday, but the number of patients on ventilators and in intensive care units has increased.
The two-week testing model will continue for staff, volunteers, caregivers and visitors in regions in the green-prevent and yellow-protect levels of the framework.
There have now been more than 98,000 infections confirmed in Ontario since the pandemic began, and 3,415 lives lost to the disease.
Elsewhere in the GTA, Halton Region reported 36 new cases, Hamilton also reported 36 new cases and Durham Region reported 46 new cases.
Two more deaths and 60 new cases were reported in the Outaouais.
Northwestern Health Unit: 92 cases, rate of 104.9 per 100,000 people. The region's COVID-19 death toll now sits at 67.