Lesson 29 DNAThe Story of You.学习目标1.Vocabulary:Mastery words and expressions: generally, twin, clone, not onlybut alsoOral words and expressions: blueprint, identical, egg, identify2.Know how to write a passage on science.3.Learn something about DNA.4.Know more about our body.学习重点1.Master the words and expressions of this lesson.2.The ability and inability.3.The use of coordinating conjunctions.学习难点The use of DNA.学法指导通过课前预习掌握基本知识，通过合作探究解决较难知识，通过堂达标巩固所学知识。知识准备上节课所学知识课题组补充学习流程复习导入Lead in the text by discussing what DNA is. Divide the class into several groups. Then talk about the subject for several minutes. Then one of the groups presents their opinions in front of the class.任务导学Listen to the tape and fill in the blanks with the correct words you hear.1.Generally speaking, a _ is a drawing.2._ for identical twins, each living thing has its own unique DNA.Play the tape once. Then let the students try to finish the task in class in oral.Step3. Reading task:Read the text quickly and answer the following questions:1.Where does your DNA come from?2.Is your DNA in every part of your body?Finish the reading task in class in oral. Try to get more information about the text at the same time.Read the text again. Find the sentences with the new words. Try to create situation about the new words. Then make sentences with the new words. If someone can make a whole story with the new words that we learn in this lesson, the teacher must encourage her. The sentences with the new words:Generally speaking, a blueprint is a drawing.Identical twins are two children that grew from the same egg.They are clones.From your DNA, scientists can identify not only you, but also people related to you. 达标检 测What is DNA? Where is your DNA from? What is DNA used for?拓展延伸Come to “LETS DO IT”.Finish the task with a partner. Find the things about you that show your parents DNA. Talk about if for a while. Then let some volunteers come to the front to talk about the subject.小结Lets summarize the key points and difficult points together.作业布置1. Understand the meaning of the text 2. Remember the mastery words in this lesson.3. Finish the activity book of lesson 29.4.Preview the next lesson30.课后反思