1、Unit 20 Lesson 3 Scientific Breakthroughs Teaching aims 1.words and phrases： 2.language points in the text 3.reading strategies 4.exercises about text 5.vocabulary:phrasal verbs and compound words Teaching time Two periods(两课时连堂) Teaching process Step 1 Revision Review the new words of lesson 2 and
2、have a diction Step 2 learn the new words of lesson 3 1.ask some students to read the new words first and correct their pronunciation 2.play the tape and have them read after the tape 3.give them a few minutes to read the new w ords freely, tell them if they cant read the words, encourage them to as
3、k the teacher . step 3 read ing 1.discuss the pictures and talk about the scientists major disco veries 2.do exercise 2 by themselves. 3.let the students look at Reading Strategies and check their answers to exercise 1 and 2. 4.play the tape twice, and do exercise 4. step 4 language points 1.think o
4、ver v.仔细考虑, 重新考虑 2.be aware of v.知道, 意识到 eg: Everybody is aware of the importance of study. 每个人都意识到了学习的重要性。 I was not aware of the fire. 我没有意识到火。 3.such as adv.例如.,象这种的 , 诸如 ., 譬如说; 象.那样的; 如此.以致 4.a piece of mass 5.an amount of adj.许多, 相当数量的; 一些 6.theory of relativity 7.for example 8.at the speed of
5、 以.的速度 at a speed of eighty miles an hour 以每小时 80 英里的速度 at fulltop speed 用全速, 开足马力尽力地; 尽快地 9.be about to v.将要, 正打算 eg: The chorus is about to sing. 合唱团就要开始唱了 10.in fact 11.away from远离 12.the further away galaxies a re, the faster they move. 13.go on holiday 正在休假去休假 e back v.回来, 在记忆中重现, 复原, 恢复, 反驳 15
6、.throw away v.扔掉, 丢弃 16.out of the ordinary 不平常的 , 非 凡的,例外的 17.a few years later 18.look for 19.sothat来 20.turn on v.开启 , 变得兴奋, 突然装出, 开始 21.go out v.出去, 熄灭, 过时, 罢工, 向往, 辞职, 倒塌 22.be interested in 对.感兴趣 23.at the time 当时, 在那个时候 24.make the first flight 25.make great contributions to贡献 step 5 vocabula
7、ry 1.phrasal verbs a)exercise 7 ask the students to read the list of phrasal verbs, and then let them do the exercise by themselves, and check their answers b)ask ten students to do the exer cise on the blackboard, then correct their answers. c)read the questions in exercise 9, and then play the cas
8、sette twice. d)ask six students to answer the questions pound words(合成词) a)合成名词：名词+ 名词 spaceship classroom 动词+介词 turn-off 形容词+名词 highway 合成动词：safe-guard mass-produce ill-treat 合成形容词：cold-blood hand-made hard-working b)do exercise 5 orally c)do exercise 3 ,4,5 and 6 in page 69 step 6 Homework Exercise 2 in page 70
