warmer is normally done by greeting and checking the homework and not necessarily related to main aim. on the other hand, Lead-in is always related to the subject of the lesson. for example for teaching the target language of this session, teacher can ask Ss to discuss about different ways of keeping body healthy by stop smoking, avoid fatty food, drinking less coffee etc.

in this lesson for increasing the opportunity of Ss for acquiring language a conversation between two colleagues on living a healthy life is included. this conversation includes many examples of `must` in obligation and logical conclusion that highly increases the chance of learning the target language without any trouble.

in this part Ss must firstly give a sensible diet to patients as a doctor. secondly give some logical advices on living a healthy life that works for many groups of people from different ages.

Ss in pair works or group works share their ideas about given task and write them on a piece of paper.

in each group one of the students report what they discussed- different ways of keeping body healthy from a doctor view-to the whole class.

teacher focus on those part of the target language that Ss didn't understand or had trouble with. clarification is done by writing the wrong examples that Ss gave and correcting them. so that students will learn how to use the language correctly.

this part is presented by a discussion on a specific subject that Ss are allowed to use their previous knowledge and target language.