"The Ontario government is protecting the health and safety of students during the COVID-19 outbreak by keeping schools closed for the rest of this school year. This decision was made after consulting with the Chief Medical Officer of Health, health experts on the COVID-19 Command Table, and medical experts at The Hospital for Sick Children. At the same time, the government is planning for the reopening of schools for the 2020-21 school year, the gradual reopening of child care, and the opening of summer day camps subject to the continuing progress in trends of key public health indicators."
https://news.ontario.ca/opo/en/2020/05/health-and-safety-top-priority-as-schools-remain-closed.html