At the beginning of class, some papers are distributed among the students that contain pictures of several inventions such as Telephone, Dynamite. Ask students what is it? or do you who invent it? Then they start to talk about the photo in the class and guess about the inventor. Write their sentences on the board and explain about the inventor that they know or don't know, so what to do and how can say it.

I will write 3 of my students sentences on the board and start to draw their attention to the sentences that they haven't subject. And focus on the verbs.

Write active sentence on the board and change it to the passive by eliminating the subject, by asking them to imagine a situation where they sitting in the class and suddenly the window breaks, then I ask them DO YOU KNOW WHO BREAKE THE WINDOW? so I write the answer on the board (the window broke) explain for them you don't know who did it and write the passive sentence ( the window is broken) then show them another changes on the board ( such as TO BE verb).Tell them that (do I know who did it or not) and explain that in this situation the incident is important not the subject of this happening. If I were point out who did it add BY at the end of sentences ( the window is broken by children). Focus on differences between active and passive sentences and how to convert them. Then explain that the object in the active sentence becomes the subject in the passive sentence. Finally change vocabulary and verb structure based on tense and person.

students are going to do the exercises 10C on page 145 in their book in 4 minutes individually. Then they can check their answers with their classmate's answers for 2 minutes and then we will check the answers as a whole.

The students are going to be divided into groups of 2 or 3. They talk about the best invention that they've known until now, and why do they think so. Finally write some of their sentences on the board and correct with each other. Be assure that they understand the concept of grammar