Canada’s largest school board is searching for additional spaces to hold classes this fall, but says it won’t know how many are needed — or where they’ll be located — until parents of elementary students confirm whether they’ll be sending their kids to school in person.Some Toronto parents, meanwhile, say it’s hard to make that decision without having more details on what classes will look like at their children’s schools.The Toronto District School Board this week approved a plan that would hire hundreds more teachers in order to keep elementary classes at no more than 20 students and kindergarten at no more than 15 in communities with a higher risk of COVID-19 spread.The board says smaller classes may require additional locations, even.