SAVE YOUR VALUABLE TIME! Ontario math teachers love our UPDATED Probability units! Lesson plans, centres, activities, worksheets, and assessments cover theoretical probability, experimental probability, tree diagrams and more.Our units encourage students to use and develop their Knowledge, Application, Thinking, and Communication skills in a way that will prepare them for success in the future."I have used many of the Ontario Math resources created by Past The Potholes and love them all. The Go