Unit3 Why Do We Believe That the Earth Is Round? I.Teaching Aims 1.Help Ss get to understand the text "Why do we believe the Earth is round?" 2.About the text,Ss should grasp the text content,text structure,basic vocabularies and required grammar points ofthe section. Words:cite,superstitious,widespread,advance,exaggerate,proof refute,invisible,horizon,predict,exceptionally,outline, credulous,authority,stray,analogy,spherical Phrases &Expressions:or other,appeal to,something in/to,follow up,for the sake of throw light on,bring out,fall back on.stray (away)from,in a way 3.About the reading.Ss should learn skills ofskimming. 4.About the writing.Ss should learn the use of specific details and write a compositionassigned by the teacher. 5.About the listening,Ss finish the Unit 3 directed by teacher II.Key and Difficult Points 1.New Words and Phrases 2.Complex Sentences III.Teaching Methods Discussion,explanation,ask and answer IV.Time:4 periods V.Teaching procedures: Step one Introduction 1.Warm-up questions: Give the students the following topics to discuss and then ask them to answer these questions. 1)How did people think ofthe shape ofthe earth in history? 2)What do you think is the shape of the earth?Can you give any1 Unit3 Why Do We Believe That the Earth Is Round? I. Teaching Aims 1. Help Ss get to understand the text “Why do we believe the Earth is round?” 2. About the text, Ss should grasp the text content, text structure, basic vocabularies and required grammar points of the section. Words: cite, superstitious, widespread, advance, exaggerate, proof, refute, invisible, horizon, predict, exceptionally, outline, credulous, authority, stray, analogy, spherical Phrases & Expressions: or other, appeal to, something in/to, follow up, for the sake of, throw light on, bring out, fall back on, stray (away) from, in a way 3. About the reading, Ss should learn skills of skimming. 4. About the writing, Ss should learn the use of specific details and write a composition assigned by the teacher. 5. About the listening, Ss finish the Unit 3 directed by teacher. II. Key and Difficult Points 1. New Words and Phrases 2. Complex Sentences III. Teaching Methods Discussion, explanation, ask and answer IV. Time: 4 periods V. Teaching procedures: Step one Introduction 1. Warm-up questions: Give the students the following topics to discuss and then ask them to answer these questions. 1) How did people think of the shape of the earth in history? 2) What do you think is the shape of the earth? Can you give any