视频简介：

选择性必修四 Unit 3 Sea Exploration
PeriodⅠ Reaching out across the Sea
主题语境： 人与自然
语篇类型： 说明文
授课时长： 45 分钟
教材分析：
本单元的主题是“海洋探索”。本节课的课型是文本阅读课，需要学生通过阅读语篇了解
中国从古至今探索海洋的过程，思考海洋探索对国家乃至整个世界的影响。体会“一带一路”，
特别是“21世纪海上丝绸之路”的深远意义。本文以说明文的体裁，以时间为线索，脉络清晰
地介绍了早期的航海探索、明代郑和下西洋，现代的“一带一路”和众多海洋科考，最后表达
对未来的展望。
文章采用了“总---分”的结构，第一段呈现了文章的主题“中国从古至今的海洋探索”。然
后提供了不同时间的海洋探索成就。文本按照时间顺序展开，每个时期的探索又从航海抵达
区域、主要事件以及航海的目的和结果等维度进行说明。利用图表梳理信息来将碎片化的信
息结构化，步步为营，层层深入，通俗易懂。文章第一段开宗明义，提出本篇文章的主题---
中国的海洋探索历史早于西方航行的探险活动。第二段介绍了古代丝绸之路，特别是海上丝
绸之路的产生与发展和对沿线地区的经贸往来和文化传播的促进作用。本段以中国唐代杜环
的《经行记》为例，展现了早期东西方的交流。第三段讲述明代郑和七下西洋拓展中外交流
的壮举。文中用 a sight to behold、 a league of their own time 等词组形容郑和率
领的船队，用 gestures of friendship 来描述中国与非洲国家之间的友好往来，呈现当时
明朝的繁荣昌盛与中国悠久的和平外交传统。第四段承接上文，指出如今的中国继续海洋探
索，并介绍了“一带一路”。这段重点介绍了“21 世纪海上丝绸之路”以及现代海洋贸易延续古
代丝路促进沿线经贸和文化交流的作用。这突出了在全球化背景下，不断深化中国和世界其

他地区的合作，推动互利共赢、经贸发展、文明交流互鉴的重要意义。第五段介绍当代中国
在海洋探索领域开展的其他国际合作，以北极为例，阐释海洋科考对于研究气候变化等全球
问题的重要性。第六段总结全文，展望未来----伴随着科技的进步，中国将继续开拓进取，
深化海外合作。
学情分析：
本节课面对的是高二下学期的学生，这个年龄段的学生思维活跃，求知欲和好奇心很强，
本节课主要内容是了解中国从古至今的海洋探索，自然更能激发学生们的兴趣，因此导入新
课更加容易。
我带的两个班，高二 7班学生程度较差，虽然很想表达，但是水平有限，阅读和表达都不
太理想，在教学过程中降低问题难度，给予更多的提示，学生积极性明显提高。高二 10班
学生水平较高，阅读理解基本没有障碍，课堂讨论能自由展开，遇到问题也能在师生和生生
互动中基本得到解决。
教学目标：
经过本课的学习，学生能够：
1. 能够快速阅读语篇，判断说明文的体裁和相应的文本特点。
1. 提取语篇信息，梳理文章结构，归纳文中中国海洋探索历史的信息；
2. 通过自主阅读和小组合作，梳理整合所读文章信息，多个角度分析和解读文本信息；
3. 基于文本和视频材料，讨论人与海洋的关系，发表个人观点。
学习准备：学生课前学了新单词，预习了课文。
教学过程：
Step I: Warming-up
1. Listen to music concerning sea exploration.

2. Watch some colorful pictures of sea plants and animals.
设计说明：激发学生的兴趣，导入单元话题 “海洋探索”，为后面的活动做好话题上的铺

S

垫。

Play a guessing game to learn about some navigators.
设计说明：通过游戏进一步激发学生的兴趣，导入本节课话题 “Reaching out across the
Sea”，为后面的阅读活动做好进一步的铺垫。
Step III. While-reading
1. Read for genre(体裁)
There are four major types of essay:
narrative, descriptive, expository 说明文, and argumentative 议论文.
This passage belongs to__________
A. Narrative : a story with a beginning + middle + end.
B. Descriptive : a subject + interesting details
C. Expository : a subject+ factual information
D. Argumentative : an idea + to convince the reader
设计说明：迅速浏览全文判断语篇体裁，了解说明文的文体特征，为进一步阅读做好铺垫。
2. Read for main idea.
1）Listen to the passage and match the main idea of each paragraph.
Para.1ꢀ A. China will continue to explore the sea and enhance
relationships with other countries.
Para.2 B. Travel from east to west began long before Columbus.
Para.3 C. In ancient times, travel east to west was on the Silk
Road.
Para.4 D. Zheng He’s sea voyages built relations with other
countries.
Para.5 E. The 21st Century Maritime Silk Road has
 encouraged cooperation and strengthened the bonds
 between China and the rest of the world.
Para.6 F. China is also joining with other countries on other
important projects.
The text mainly talks about ______________ in the past and now. As
time went by, some explorers reached across the sea in order to
strengthen the bonds between ______________________________.

2）Read and find out how the passage is organized.
设计说明：听录音归纳各段落的段落大意，验证文体，找出文章的线索，为进一步阅读
做好铺垫。
3. Read for structure.
Para 1: an ________ to the topic
Para2-3: Sea exploration in the ______
Para4-5: Sea exploration __________
Para6: Sea exploration ____________
设计说明：将文章分成四部分，分门别类，为下一步的细节理解做好准备。
4. Read for details. (Finish the timeline)
1) Which is introduced in each exploration?
 Para Time Region Purpose/
 Significance
2 Ancient times _____trade deals,
cultural awareness
3 4 5
6 unknown
2) Read the passage and finish Ex4 on P27.
Name Description
The name of the trade route between China and the
West
Its kings sent gifts such as giraffes to China
An area currently being explored for scientific
reasons
A destination of silk and a major European capital
The modern country name for Ceylon
The historical period when China expanded maritime
exploration to other regions
The author of Record of My Travels
The commander of the seven fleets
The person who wrote stories that inspired European
explorers
3) Choice questions
1. Why did European explorers look for sea routes?
A. To find the route from east to west.

B. To discover the mysteries of the sea.
C. Being driven by curiosity and the need to trade.
D. Being inspired by Marco Polo’s tales.
2.How did ancient China trade with other countries?
A. Through the Silk Road and sea routes.
B. Through negotiating with other countries at home.
C. By inviting foreign merchants to China.
D. By overland trading.
3. What's the purpose of the Belt and Road Initiative?
 A. To satisfy people's curiosity and desire
B. To promote trade cooperation and enhance the relationship
C. To revisit the ancient sea routes travelled by Zheng He
D. To invest billions in systems and services.
4. Now the advantage to reach out across the sea is ______
 A. that we have done it for hundreds of years
B. that we have advanced technology C. The need to trade
D. the desire to enhance relationship
设计说明：利用图表、信息匹配和细节选择等形式来梳理信息，对语篇进行有目的的细
节理解。
Step IV. Post-reading
Look at a video about “the Belt and Road Initiative” and
discuss
What benefits can “the Belt and Road Initiative” bring?
设计说明：观看网上的“一带一路”英文视频，让学生们讨论并归纳“一带一路”对推动互利
共赢、经贸发展、文明交流互鉴的重要意义。
Step V. Critical thinking
Summarize the key points of the class and have a critical thinking
about the question below:
Is sea exploration a good thing or a bad thing? Why?
设计说明：通过重温本堂阅读课的精髓，总结中国从古至今探索海洋的过程，批判地去
看待海洋探测，达成“探索海洋，保护海洋”的共同意识。 Step VI. Homework
Write a small essay about what we human beings can do to protect the sea.
1. The significance of the sea

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