Warming up is to tell Ss how different kinds of food are grouped. This is important as it enables us to talk about the value of particular foods to our health. We want Ss to appreciate what a balanced diet is. Too much fatty food means they will store extra energy in their bodies.

Of course Ss are familiar with the topic. Whatever the activity is, they can always say something. The relative words and expression are familiar to them. Also Ss are interested in how to eat healthy which is totally new to them.