Seven Toronto District School Board (TDSB) schools are among the 27 in the province that have reported COVID-19 cases.
All seven of the cases have been attributed to staff members, three of them at high schools — Earl Haig Secondary School, York Mills Collegiate Institute and the School of Experiential Education.
Earl Haig is one of the schools that was identified by the TDSB as having a potential classroom shortfall as 78 per cent of the student body or 1,423 students will be returning when classes start on Thursday.
Bloordale Middle School, Don Mills Middle School, Brookhaven Public School and Charles G. Fraser Junior Public School also all reported cases on Tuesday.
Elementary schools began a staggered start to the school year on Tuesday with the return to class happening over three days.