Students in Ontario have been learning online since mid-April.
"My position has been always, like our public health measures table and our medical officers of health, that feel that schools should be the last to close and the first to open", Williams said at a news conference last week.
According to reports by both CTV News and the Toronto Star, sources have indicated the provincial government is leaning toward keeping schools closed until September, but Elliott said no final decision had been made as of Tuesday.
The announcement by Ford will take place from Queen's Park at 1 p.m.
Ford is meeting with his cabinet on Wednesday morning.
But other measures like the five-person limit on outdoor gatherings and restrictions on in-person retail and other businesses remain.
Their announcement comes after weeks of encouragement from the outgoing chief medical officer of health, a collaborative of epidemiologists advising the province and most local medical officers of health to return some or all schools to in-person learning for the month of June.
The province is aiming to start reopening the economy later this month with looser rules on businesses and outdoor activities.
The table believes most health units would be able to mitigate and manage the increases in their communities.
Dr. Eileen de Villa said in a statement that TPH participated in a study with Sick Kids which showed there are usually multiple strains of COVID-19 in school populations.
Ontario parents, teachers and students are still anxiously awaiting the formal announcement from Premier Doug Ford about whether or not schools will be reopening along with the rest of the province in the coming weeks, but it seems that the province has already made its decision on the subject.