Ontario elementary students to return to class full-time, hybrid learning for most high schoolers “Because of its lower risk profile, Limestone is permitted to have secondary students return full time,” a statement from the Limestone District School Board read.However, two French school boards in the region, Conseil des écoles catholiques du Centre-Est and Conseil des écoles publiques du Centre-Est have high schools that will be subject to the hybrid model.In Kingston, École secondaire publique Mille-Îles and École secondaire catholique Marie-Rivier, in Brockville, Académie catholique Ange-Gabriel and in Trenton, École Secondaire Publique Marc-Garneau will have class cohorts of approximately 15 students, who will attend classes in-person.