Unit 7 I used to be afraid of the dark 课时教学设计（表格式）鲁教版（五四制）八年级下册

Unit 7 I used to be afraid of the dark. Purpose To introduce Ss to the unit goals: talk about what you used to be like. To set the scene, increase Ss’ vocabulary and introduce the target language. Picture There are four youngsters in the picture, two boys and two girls. The two boys (on the left side of the picture) are talking to each other, as evidenced by the speech bubbles above their heads. The first boy is commenting to the second boy, Mario, that he (Mario) used to be short and Mario is agreeing with him. There is also a thought bubble above the first boy’s head and it shows him thinking about the time when he was taller than Mario (who was shorter and wearing glasses). Standing behind Mario is a girl with long black hair. She has a thought bubble over her head that shows her with shorthair. Next to this girl is a girl with blond straight hair whose thought bubble shows her with red curly hair. Culture Focus Genetic differences To put it very simply, your genes determine the physical traits that you have. Each gene is made up of two chromosomes, one that comes from the mother and one from the father. Certain genes are dominant and certain genes are recessive, which explains why, in some cultures, you are not likely to find certain traits, e.g. blue eyes on a Chinese baby. Blue and green eyes are recessive genes and in order for them to appear, the baby must have two recessive chromosomes. What this means is that if a child has one chromosome for blue eyes and one for brown eyes, the child will have brown eyes because brown is dominant. In the past this was very clear-cut as interracial marriages and unions were not as common. As the world becomes more globalized and more people are marrying someone not from their own culture, the possibility of a Chinese baby having blue or green eyes becomes higher. In recent years, there have even been reports of a black couple in Nigeria having a white, blonde baby. Optional Approach How have you changed Before starting this unit and the first activity, the T can divide the class into two groups (one on the left and one on the right) . Tell Ss that they will need to think about one aspect about themselves that has changed since they became a teenager (i.e. since they turned 13). Tell the group on the left to think about a physical aspect that has changed (i.e. something about their physical appearance). This could include not having pigtails anymore or having a better/worse complexion, etc. Next, tell the group on the right to think about one aspect of their personality that has changed. This could include being more helpful or enjoying reading. Tell Ss to think of something more unusual. For example, most of them would have grown taller, so they should not give that as an answer. Give Ss about 30 seconds to think of something and write it down. Then, get Ss to share this information with the rest of the class, starting with one person from the group on the left and then continuing with someone from t ... ...