人教版必修三第四单元教案

1、学习必备欢迎下载Unit 4 Astronomy: the science of the starsHow life began on the earth (reading)Teaching Aims:Knowledge aims: 1. To get Ss to know someth ing new words and structures about the astro nomy.2. To grasp the idea of the passage.Ability aims: 1 .To develop Ssbasic skills of speakinand reading. Rea

2、ding is the focus in this less on. Readi ngskills for Ss in clude (predict ing, skim ming, sca nning and digesti ng.)2.To retell the story accord ing to the time order Emotional aims: To develop the stude ntsrespon sibility to protect the earth.Lesson typeperiod 1Lesson time：45 mi nu tesTeaching imp

3、ortant points1. Let ss. lear n some related words ,expressi ons and structures in this part;2. Improve ss. reading skills (predicting, skimming, scanning, guessing difficult words, topic senten ces)3. Help ss. un dersta nd the developme nt of the creatures accord ing to the time orderTeaching diffic

4、ult points:To retell the developme nt of the creatures accord ing to the time orderTeaching methodsTask-based teach ing and Cooperative learni ngTeaching Aids:a multi-media computer and a blackboardTeaching Procedure:Step 1. Warming-up & lead-inTask 1 (class work)To show some pictures about eight pl

5、a nets on PPT and get the stude nts to match the pictures with their En glish names.Task 2 (in dividually)Brain-storm some topics that are about astronomy. If the students cant think of much, I will listsome of them.Task 3 (group work)To offer some questio ns about astr onomy and get the stude nts t

6、o choose what they are the most interested in to学习必备欢迎下载answer. Then tell the ideas to the group members. The following questions are in cluded.1. How did the uni verse begi n?2. How did the life on the earth begin?3. What is the“black whole”？4. Is there life on other planets besides the earth?5. Wh

7、at happened to all the matter after the“Big Bang”？Step 2. Pre-readingTask 1 to tell the story (class work)To show the pictures about that Nvwa ,God and Darwin, and to get the stude nts to an swerQ: Can you tell someth ing about the pictures?Task2 predict ing (in dividually)Read the title of the pass

8、age and predict what the passage is about.Step 3. While-readingTask 1(i ndividually) Teach ing the new words and structuresStudents are encouraged to preview the text and find out the new words and structures. They should try to work outthe meaning of the new words through con text. If n ecessary, t

9、hey can look up in the dict ionary or turn to the teacherfor help.Task2 skim ming (in dividually)Ss are required to go through the whole passage quickly to get the gen eral idea and pay special attention to the firstor last Para of the article (or the first sentence or the last sentence of each Para

10、.)Task 3 sca nning (group work)1.When did the“big bang”happe n?2.What form w as the earth after the“big bang”?3.How did water come into being on the earth?4.what made up the earth atmosphere after the earth exploded?5.whats the significanee of the presenee of water on the earth?6.what was importa nt

11、 to the developme nt of fish?7.what made possible the rise of mammals on the earth?8.why are mammals differe nt from all life forms in the past?Task 4 careful readi ng (group work)En courage Ss to read the passage aga in. Accord ing to the time order, stude nts are en couraged to excha ngetheir un d

12、ersta nding of the passage with their group members and work together to fill in the followi ng form:学习必备欢迎下载43)* I)5789Step 4. Post-readingTaskl retell (pair work)look at the picture on the page of 26 of the text book and retell the procedure of the developme nt ofthe creatures.Task2 Discussi on (G

13、roup work)Reread the sentence“The earth may become too hot to live onWhat can we do to protect the earth?Step 5. HomeworkTask1 con solidate the new words and structures they have lear ned.Task 2 Encourage Ss to go to the school library or get on the Internet if possible to consult relatedEnglish websites to search for more inform