Warming up、Pre-reading、Reading、Comprehending名师教学设计2

Unit 2 sailing the Ocean Teaching goals 1.

Enable the students talk about some famous navigators and explorers in the history. 2.

Enable the students talk about navigation. Teaching important &difficult points Teach the students to talk about how the early travellers sailed the oceans. Teaching methods Talking,discussing and group-working. Teaching aids Projector,ppt etc. Teaching procedures Step I Warming up Get the students to have a basic idea of explorers and navigators,and then talk about the difference between the two. 1.What is a navigator?What’s he difference between a Anavigator and an explorer?

A navigator explores new routes across the sea. A navigator explores the sea; an explorer discovers new places on land. StepII

Pre-reading

Questions 1.Can you identify these early navigational instruments seamen used? 2.How do they work? a bearing circle the first instrument to measure the sun’s position and the sun’s shadow

an astrolabe a special tool for telling the position of the ship inrelation to the sun and

various stars a quadrant

measure how high stars were above the horizon Sextant an updated navigational instrument to measure the angle between two

fixed points outside the ship Step III Reading Read about what navigation was like before modern instruments were used. Page 1 Fast-reading to get the general idea. Read the passage and answer the following questions. 1.What is the use of a bearing circle, astrolabe, quadrant or sextant?

( B )

What is the use of a compass?

( A )

A. to set the course of the ship

B. to measure the position of the ship

C. to measure the speed of the ship

D. to tell the time 2. Use the information to analyze the navigational skills and write the answers in your own words. Using nature Keeping alongside the coastline Using celestial bodies Using wildlife Using the weather Using the sea Using celestial bodies Page 2 Fast-reading to get the general idea. Then answer the question. Why is the position of the sun and various stars useful for working out

latitude? The position of the sun and stars are useful for working out latitude because they are fixed points in the sky and their movements in relation to the earth are already known. So they can be used to measure a ship’s

position.

Read again and fill in the blanks

There were two methods to find longitude:

Measuring time and speed compass and complicated mathematical tables Write down the working principles of the following instruments: Bearing circle: Astrolabe: Quadrant: Sextant: Step IV Comprehending Discuss Suppose your were a sea captainWhat skills would you seek in

your sailors? The sailors would need to be excellent navigators, able to cope with both hot and cold weather, experienced in sailing through very bad weather and able to co-operate in a team. Step V Homework Review the text a third time and get more familiar with the content,remember useful words and expressions.