During a maths lesson the Yr 3.2 students of Ms Miranda were divided In groups. Each group was given a number of coins ranging from 50c to 1c.   The groups had to imagine that they were going to buy a particular object assigned to them.  Students had to use different coins to make the same amount.  In so doing children learned that they can make the same amount using different coins and rehearsed working out totals beyond 20c.