At Maths time I was learning to tell the time on a clock or a watch or a phone or on the ipad. On this clock here, the big hand is on the 12, and the little hand is on the 2. This means it is 2 o'clock. If I change the little hand and it points to 3, then it would 3 o'clock. At first it was tricky to learn the time, but now it's not tricky.
