高中英语-Unit4-全单元教案必修三.doc

Unit 4 Astronomy: the science of starsPeriod 1 Warming up & Pre-readingTeaching aims:1. Learn the new words.2. Talk about the science of starsStep 1 WordsLearn the new words of this unit.Step 2 Warming up & lead in1. Talk about science subjectsT: Good morning/afternoon, everyone. What class do you have today?S1: Maths, English, Chinese, physics, history, and geology.T: What other subjects do you have in school?S2: Computer, chemistry, biology, music, PE, and politics. T: Which is your favourite? Why? S3: My favourite one is because its very interesting/exciting/instructive/S4: I like best because 2.Talk about universe and solar systemT: Lets follow this astronomer to learn about universe. How did the universe come into being? S1: After the “Big Bang”, the universe came into being. T: Do you know the solar system in the universe? What is it made up of? S2: The solar system contains eight planets and many comets and other objects.T: Can you name the eight planets?S3: The Sun, Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune. T: Which planet do we live on? Can you describe what it looks like?S4: Earth. It supports a variety of life and 70% of the earth is covered with seas or oceans. T: Why does life only exist on the earth?S5: Because there is air and water on the earth. Step 3 Pre-reading Get the students to discuss the questions on page 25 with their partners. Then ask the students to tell their stories. Encourage them to tell different stories, If they dont know any, tell them some.Read some stories to the students.Pangu separates the sky from the earth;The Biblical Account;India;Japan;Europe;Let them discuss in groups.Step4 Homework1. Review the words of this unit.2. Preview the passage of “Reading”.3. Do page 27 Ex.3.Unit 4 Astronomy: the science of starsPeriod 2 Reading and ComprehendingTeaching Aims: Enable the Ss to say something about astronomy Help the students to form a good habit of reading Cultivate the Ss awareness of protecting the earth.Teaching Importance: How to improve the Ssability to understand how life began on the earthTeaching Methods: Task-based method Teaching Procedure:Step1. Warming up1. Free talk2. Review the words of Unit 4 by playing chess on the blackboard.Step2 Leading-in1. Talk about some pictures.2. Watch a video and then ask the Ss to put the pictures on the screen into a right order.Step3 ReadingTask 1 SkimmingRead the passage quickly and join the main idea for each paragraph.Para.1 a)The arrival of humans and their impact on the earthPara.2 b)The development of plants and animals on the earthPara.3 c)A widely accepted theory about the formation of the universePara.4 d)The importance of water for lifePara.5 e)The formation of the earthTask 2 ScanningRead the passage carefully and then fill in the blanks with different kinds of living things.Task 3 Careful Reading:Finish the summary according to the text:After the “big bang”, the earth was still just a cloud of _,it _loudly with fire and rock, which were _ to produce the_, carbon dioxide and other gases. Then _ grew. They multiplied and filled the oceans and seas with _. Many millions of years later the first _ began to appear on land. When the plants grew to forest, _ appeared for the first time. They produced young generally by _. When dinosaurs disappeared, _ became more important.Task 4 Post ReadingDiscuss in groups.1.What problems have been caused by humans to the earth?2.How to protect the earth and make it a better place to live on?Step 4 Homework1. Search the Internet for the imformation of the development of life.2. Read the passage carefully and try to find out key points. Period 3 Reading (2)Teaching goals:1. Learn the usage of some difficult words and expressions.2. Train the students ability to remove the difficulties while reading.Teaching important points:Train the students ability to cooperate with others.Step 1 Revision1. Check up the homework.2. Have a quiz of the words.Step 2. Language points 1. It exploded loudly with fire and rock, which were in time to produce the water vapour. Which leads non-restrictive attributive clause. in time: sooner or later; eventually I will see him in time. In time ( for sth/to do sth): not lateShe will be back in time to prepare dinner.In/out of time: in/not in the correct time2. Whether life will continue on the earth for millions of years to come will depend on whether this problem can be solved.To come: serves as attributiveShe is the last person to do such a thing.Depend on: something might only happen or be true if the circumstances are right for itOur success depends on whether everyone works hard or not.3. by laying eggs. lay-laid-laid-laying 放, 把. 放在.; 产卵 He laid his books on the desk.4. give birth to 1) 生（孩子） Shes just given birth to a healthy baby girl. 她刚刚生了个健康的女婴。 2) 产生 The extraordinary experience gave birth to his latest novel. 这段奇特的经历促成了他的最新的一部小说的诞生。5. They are putting too much carbon dioxide into the atmosphere, which prevents heat from escaping from the earth into space. prevent sth. / sb. (from) doing sth. 制止(防止)某人(某物)做某事Nothing can prevent this plan from being carried out.6. the earth may become too hot to live on. 地球可能会因此变得太热而不适合生物的生存。 The question is too hard to understand.Step 3 Homework1. Recite Para 5 of this passage.2. Do Ex.1 and 3 on page63.3. Preview the grammar of this unit.Period 4 GrammarTeaching Aims: To learn about Noun Clauses as the SubjectTo discover useful structures.Step 1 RevisionCheck up the homework.Step 2 PreparationShow some sentences on the blackboard.a. A tree has fallen across the road.b. You are a student.c. To find your way can be a problem.d. Smoking is bad for you.e. “How do you do?” is a greeting.f. What she said is not yet known. g. That we shall be late is certain.h. Its certain that we shall be late .T: What part does the underlined part serve as in each sentence? Or find its subject in each sentence.Step 3 Grammar1. Give the students some time to find the sentences in the passage. The collect answers from the class.2. Show typical examples of how to make a subject clause. Guide the Ss to find out what changes we have to make when we make a sentence or combine two sentences using subject clause. Teacher shows the example and Ss write down the sentences.3. Turn to page 64. Read the following passage quickly and finish the eight sentences.Step4 Homework1. Do Ex.2 and 3 on page 29.2. Finisg Ex.1 on page 64. 3. Preview “Using languge”.Period 5 Using Language and speakingStep 1 RevisionCheck up the homework.Step 2 Reading- A visit to the moon1. Play the tape for the Ss to listen.2. Read the passage carefully and then describe the three ways in which gravity changed for Li Yanping and how his weight changed.3. Find out the key points.Step 3 SpeakingSpeaking on page 31What do you need if you travel to the moon?Sample: S1: Lets think about what we would need to protect our skin if we visited the Moon.S2: Id take some skin cream. That works very well when we go to the sea.S3: Yes, but its going to be much too hot to put cream on your skin on the Moon.S4: Whats more you get direct heat from the sun. There are no clouds on the Moon to protect you.S3: Oh dear, and I also have to ca