The Clock Exercise (C320-1) supports the primary and lower elementary child's developing understanding of time-telling and the base-60 structure of our timekeeping system. It offers concrete, hands-on practice with reading both analog clock faces and understanding the relationship between hours and minutes in a Montessori-aligned sequence. This is a reliable classroom resource for extending math work into practical life concepts, particularly useful when children are ready to move from abstract number work into real-world application.