Changes

* Once they have got a hang of how area and perimeter are calculated, arrange the squares in a random shape on the grid and ask them to calculate the area and perimeter. Ask one student to explain how they did it and whether everyone used the same method or if anyone used a different approach.

* Once they have got a hang of how area and perimeter are calculated, arrange the squares in a random shape on the grid and ask them to calculate the area and perimeter. Ask one student to explain how they did it and whether everyone used the same method or if anyone used a different approach.

* Next, use the dual mode and create two different shapes having the same area and perimeter. Eg:[[File:Area perimeter.png|left|thumb|500x500px| * ]]

* Next, use the dual mode and create two different shapes having the same area and perimeter. Eg:[[File:Area perimeter.png|left|thumb|500x500px| * ]]