Write a summary of the following passage.
To be a good teacher need some of the gifts of the good actors; you must be able to hold the attention and interest of your audience, you must be a clear speaker with a good, strong, pleasing voice which is fully under your control, and you must be able to act what you are teaching in order to make its meaning clear.
Watch a good teacher, and you will see that he does not sit motionless before his class; he walks about, using his arms, hands and fingers to help him in his explanation, and his face to express his feelings.
The fact that a good teacher has some gifts of a good actor does not mean that he wills indeed be able to act well on the stage. There are very important difference between the teacher’s work and the actors. The actor has to speak words which he has learnt by heart; he has to repeat exactly the same words each time he plays a certain part; even his movements are usually fixed before.
The good teacher works in quite a different way. His audience takes an active part in his ply; they ask and answer questions, they obey orders and if they do not understand something, they say so. The teacher, therefore, has to suit his act to the needs of his audience, which is his class. He cannot learn his part by heart, but must invent it as he goes along.