【教学设计】Unit 5 Lesson 26（冀教）

Unit 5Look into Science Lesson 26 Keep the Candle Burning 1 Analysis of the Students The students of Grade 9 have mastered certain vocabularies expressions and structures They also have the abilities of self teaching and working in groups Most of them are willing to express their opinions in English 2 Analysis of Teaching Content Lesson 26 is the second lesson in Unit 5 Book 5 This unit focus on the subjectLook into science also teach the students something about science Students cares about the subject because it is close to everyone Lesson 26 mainly talks about learn to do another experiment 知识目标 1 To master the words match light burn use up candle holder shallow oxygen one fifth 2 To master the expressions do an experiment fill with cover with turn upside down be not sure 能力目标 Improve the students ability of speaking listening reading and writing Do and express the experiment 情感目标 教学目标教学目标 教材分析教材分析 Students can enjoy the pleasure of literature 教学重点 The usage of prefer 教学难点 Write a composition to describe an interesting experiment Tape recorder Multimedia Step 1 Warm up Free talk Think about it 1 Do you think science is interesting Why or why not 2 Name one or two famous Chinese scientists What do you know about them Step 2 Presentation 1 Do an experiment 2 Show the picture and tell students the experiment Keep the Candle Burning 3 Introduce something we need in the experiment meanwhile learn the new words 4 Guess What do we do the experiment 5 Read the text and fill in the blanks on page 69 Let s do the experiment together Put the candle in the candle holder Put the candle holder on the dish Fill the dish half full with water Light the candle with a or a lighter What can you see The candle is burning the candle burn for two or three minutes Then carefully put the jar over it until the top of the jar rests on the dish As the candle burns it the oxygen in the air When the candle stops it has used up all the oxygen in the air The water inside the jar and fills about of the jar This is because about one fifth of the air is made up of oxygen 6 Check the answers 7 Guess What is happening Listen to the tape and answer the question 课前准备课前准备 教学过程教学过程 8 Listen and follow to the tape 9 Explain the expression of fractions 1 分数由分子和分母两部分构成 用英语表达时 分子用基数词 分母用序数词 2 如果分子为 1 则分母的序数词是单数形式 如果分子大于 1 则分母的序数词用复数 形式 one a half 或 one second one second one a quarter 或 one quarter Step 3 Practice 1 Practice the text in groups 2 Finish the exercise on page 69 3 Retell the experiment Step 4 Consolidation 1 Group work Teacher asks students prepare something they need in experiments in groups Do the experiment in groups Read about the experiment in this lesson With a group of classmates practice the experiment Do your experiment in front of the class Don t forget the following things 1 First describe your experiment 2 Second ask the class what they think will happen 3 Third do the experiment 4 Finally ask the class if the result is what they expected 2 S