1、Unit 5 Look into ScienceLesson 25: Lets Do an Experiment!课题Lesson 25 Lets Do an Experiment!课型New课时One教学目标知识目标:Words and expressions能力目标:Do and express the experiment德育目标:Love science教学重点一、重点词汇Science, experiment, theory, fill, jar, upside, probe, observe二、重点句型1）A theory predicts what will happen.2）I
2、m not sure.3）Maybe you should do this experiment outside, Brian!教学难点Write a composition to describe an interesting experiment.教法Talk ,listen , read, practice学法Talk ,listen , read, practice教具tape slides板书设计Lesson 25【辨析比较】maybe与may be 【辨析比较】another, the other, other, others【拓展延伸】含有turn的动词短语有： turn on开
3、，旋开（电灯、无线电、水龙头等） turn off关掉 turn away转过脸不面对 turn over翻身，翻过来 turn up调高，调大 turn down关小，调低教 学 教 程教 师 活 动学生活动Step 1.Greetings.设计意图：让学生做好上课的准备。Step 2. Think about it.1. What kinds of experiments have you done in science class? 2. If you hold a jar that is filled with water upside down, what will happen?设
4、计意图：与学生进行一个简短的对话，进入本课主题。Step 3. Show the pictures.Show the students two pictures to let them know two phrases.设计意图：通过展示图片让学生理解两个短语的含义。Step 4. Read and answerRead the text and answer the following questions:1) Why does Danny say they should do this experiment outside?2) What will Brian do?3) Does Dan
5、ny have the same theory as Brians? 设计意图：让学生带着任务读课文。Step 5. Lets do it.1) Discuss in groups about the experiment.2) Make a list of the materials and tools that we were used in the experiment.3) Write down two different theories. 4) Write down the steps of doing the experiment.5) Write down the result
6、 of the experiment. 6) Make a conclusion.设计意图：让学生通过小组合作对这一实验的设计及结果更加明确。Step 6. Language Points1) fill with 用装满He has filled his case with many books. 他已经把书装满了箱子。2) coverwith 用盖住I cover the top with a piece of cardboard.3) upside down 的意思是“向下翻转过来”。 You hold the book upside down. 你把书拿倒了。拓展：right side
7、up 是“正面朝上”的意思。4）be sure +that 从句表示“认为一定”。而be not sure表示不确定。 Im sure she will come here. 我确信她会来。Im not sure when hell come here. 我不能肯定他什么时候来这儿。5) observed 动词, “观察”observe sb. do/ doing sth. 例句：I observed her dance.When I passed by the grass, I observed him walking.设计意图：通过教师讲解让学生对重点知识更加熟悉。Try to answe
8、r the two questions.Enjoy the pictures.Read the text in groups.Have a discussion with your group mates.Let the students write the important language down.教 学 教 程教 师 活 动学生活动矫正反馈Step 7. ExercisesLet the students do some exercises about the key points.设计意图：通过练习让学生巩固本课的重点知识。Step 8. Homework请根据课文内容, 以 “A
9、n Interesting Experiment”为题写一篇小作文。Students do some exercises.课堂测试题一、根据句意及首字母提示完成下列句子。1. Do you often do e _ in your physics class?2. Ill p _ that what he said is right.3. He likes to read books about s _.4. Mr. Smart sat in a corner and o _ what was going on with this little aunt.二、选择与划线部分意思相同或相近的词。
10、1. Is the theory right or wrong? A. idea B. way C. mind D. answer2. Dont turn the bottle upside down. A. away B. off C. up D. over3. When I do the experiment, you must watch closely. A. learn B. know C. see D. observe4. - Excuse me! May I ask you a question? - Certainly. A. No B. Sorry C. Sure D. Thanks教学反思4