The break will now happen the week of April 12.
Remaining school districts will restart either Feb. 8 or Feb. 16, depending on location.
Students in COVID-19 hot spots like Waterloo Region, Windsor and the GTA, are still learning remotely.
Other regions will continue to teach students online.
There’s “no doubt” online learning is a challenge for students who have autism.
The change comes days after the province announced classes for southern Ontario students would be staying online for the majority of the month.
The financial boost was initially offered only to the parents of elementary and middle schoolers.
The precaution will help the education system be ready for "all scenarios," said Education Minister Stephen Lecce in a memo.
Nearly 700 Ontario schools have had a reported coronavirus case.
Schools will stay open “in January and beyond.”