Age group for Preschool is 2-4 years old. Whereas Kindergarten age group is 4-5 years old. Preschool education is not mandatory. However, kindergarten is mandatory for every child. Kindergarten education is more formal than a preschool. In the kindergarten there is two ECE(Early Childhood Educator) teachers and two OCT(Ontario Certified Teacher). In kindergarten OCT have leadership role and ECE are the assistant of the OCT.