Unit 5 Revealing Nature-Presenting ideas 教案-2025-2026学年高中英语外研版选择性必修第一册

该高中英语教案聚焦“自然探索观点表达”核心知识点，通过播放《地球脉动》等自然纪录片片段激活兴趣，结合核心词汇（如evolve, adapt to）与句型（强调句）复习，搭建从旧知到新知的学习支架，梳理语言知识与表达逻辑。 该资料特色在于融合多模态输入与输出，通过模型文本分析（结构与语言点）、小组合作探究（纪录片讨论与展示）、多元评价（学生互评与教师反馈），提升语言能力（准确运用核心词汇句型）、思维品质（逻辑组织与批判性评价）、文化意识（环保跨文化认同）。实例包括过渡词练习、小组展示评价，助力学生提升综合语言运用能力，为教师提供可操作的分层教学方案。

Unit 5 Revealing Nature-Presenting ideas 内容导航 This section centers on presenting ideas about nature exploration. It guides students to review scientific discoveries in the unit, use proper English to introduce nature documentaries or scientific findings, and express personal views on nature, helping them integrate language skills with scientific literacy. 教学目标和重难点 1. 教学目标 Language Ability: Students master core vocabularies and sentence structures related to nature exploration, and improve their ability to express scientific views orally and in writing. Cultural Awareness: They understand the global significance of nature protection and form a sense of cross-cultural identity in environmental protection. Thinking Quality: They develop logical thinking by organizing and presenting ideas, and critical thinking by evaluating different views on nature. Learning Ability: They learn to cooperate in groups, actively participate in interactive activities, and master effective strategies for presenting ideas in English. 2. 教学重难点 Key Points: Mastering core vocabularies (e.g., evolve, adapt to, species) and sentence structures (e.g., emphasis clauses, formal objects) in this unit; being able to clearly introduce a nature documentary or scientific discovery and state reasons. Difficult Points: Using accurate and appropriate English to organize and present ideas logically; integrating scientific knowledge with language expression; expressing personal views on nature exploration and protection fluently and coherently in interactive activities. 教学过程 Step 1: Lead-in (Warm-up and Activation) Activity 1: Video Appreciation and Discussion The teacher plays a 3-minute short video about a nature documentary, such as a clip from "Planet Earth" showing the evolution of species or the interaction between organisms and the environment. After watching the video, the teacher asks students the following questions: 1. What did you see in the video? 2. What secrets of nature does the video reveal? 3. Have you ever watched any other nature documentaries? If yes, what impressed you most? Students are invited to answer the questions one by one. The teacher guides them to use simple English to express their views, and writes down key words and expressions they mention on the blackboard, such as "nature documentary", "species evolution", "environmental protection", "adapt to the environment", etc. Then, the teacher briefly introduces the topic of this lesson: "Today, we will learn how to present our ideas about nature exploration and nature documentaries in English, which is the core content of Presenting Ideas in Unit 5 Revealing Nature." Design Intention: The short video can quickly attract students' attention and arouse their interest in nature exploration, which is in line with the theme of the unit. Asking questions helps activate students' prior knowledge and existing language reserves, and guides them to enter the topic of presenting ideas naturally. Writing down key words and expressions lays a foundation for the subsequent language output activities, and also helps students sort out their thinking and express themselves more clearly. Activity 2: Vocabulary and Sentence Review The teacher reviews the core vocabularies and sentence structures of the unit in combination with the lead-in activity. First, the teacher shows pictures or English definitions of the core vocabularies, such as "evolve", "adapt to", "species", "ancestor", "beak", "evolution", and asks students to read and spell them correctly. Then, the teacher gives example sentences related to nature exploration, such as "It was the birds that interested Darwin the most during his voyage." and "Their beaks seem to have evolved according to what food was available on that particular island." Students are asked to read the example sentences aloud, analyze the sentence structures (emphasis clause and subject-predicate structure), and then try to make sentences with the given vocabularies and sentence structures. For example, students can make sentences like "Many animals have to adapt to the changing environment to survive." or "It is the scientific spirit that drives people to explore the secrets of nature." The teacher walks around the classroom to check students' performance, corrects their mistakes in pronunciation, grammar and expression, and provides timely guidance. Design Intention: Reviewing core vocabularies and sentence structures is an important premise for students to present ideas in English. Through picture prompts, example sentences and sentence-making exercises, students can consolidate their mastery of language knowledge, improve their language accuracy, and ensure that they can use appropriate language to express their views in the subsequent presenting activities. The teacher's on-site guidance helps solve students' immediate language problems and lays a solid foundation for the smooth development of the follow-up teaching activities. Step 2: Presentation and Demonstration (Input and Guidance) Activity 1: Model Analysis The teacher presents a model passage about introducing a nature documentary on the screen. The passage is as follows: "The nature documentary I want to recommend is 'The Blue Planet II'. It is one of the most wonderful nature documentaries I have ever watched. This documentary shows the beautiful scenery of the ocean and the living habits of various marine organisms. It reveals how marine organisms adapt to the marine environment and how human activities affect the ocean ecosystem. I recommend it because it not only lets us appreciate the beauty of nature but also reminds us to protect the marine environment. We should take action to protect our blue planet and all living things on it." The teacher asks students to read the model passage silently first, and then invites several students to read it aloud. After that, the teacher leads students to analyze the structure of the model passage: 1. Opening: Clearly point out the name of the documentary to be recommended. 2. Body: Introduce the main content of the documentary and the nature secrets it reveals. 3. Closing: State the reasons for recommendation and express personal views on nature protection. At the same time, the teacher highlights the key vocabularies and sentence structures used in the model passage, such as "recommend", "wonderful", "show", "reveal", "adapt to", "affect", "not only...but also...", and explains how to use these language points flexibly in presenting ideas. For example, the teacher explains that when introducing the main content of a documentary, we can use verbs like "show", "introduce", "describe", and when stating reasons, we can use conjunctions like "because", "so", "therefore". Design Intention: The model passage provides a clear example for students to present ideas, helping them understand the structure and language characteristics of presenting ideas about nature documentaries. By analyzing the structure and language points of the model passage, students can master the methods and skills of presenting ideas, and learn how to organize their language logically and express their views clearly. This link also realizes the organic combination of language input and skill guidance, laying a foundation for students' independent presenting activities. Activity 2: Skill Guidance On the basis of model analysis, the teacher further guides students to master the skills of presenting ideas. First, the teacher explains the key points of presenting ideas: 1. Clarity: The content to be presented should be clear and concise, and the views should be distinct. 2. Logic: The structure should be reasonable, and the transition between paragraphs and sentences should be natural. 3. Accuracy: The language should be accurate and appropriate, and the vocabularies and sentence structures should be used correctly. 4. Emotion: When expressing views on nature protection, appropriate emotional color should be added to arouse the resonance of the audience. Then, the teacher focuses on guiding students to use transition words and phrases to improve the logicality of their expression. The teacher lists common transition words and phrases related to presenting ideas, such as "firstly", "secondly", "finally", "in addition", "besides", "however", "therefore", "as a result", and gives example sentences to illustrate their usage. For example, "Firstly, this documentary shows the beauty of nature. Secondly, it reveals the importance of environmental protection. In addition, it teaches us a lot of scientific knowledge about nature." Next, the teacher invites students to practice using these transition words and phrases to connect the sentences they made in the previous vocabulary review link. For example, students can connect their sentences like this: "Many animals have to adapt to the changing environment to survive. However, some animals cannot adapt to the rapid changes and are in danger of extinction. Therefore, we should take measures to protect the environment and help these animals." The teacher comments on students' practice, affirms their advantages, and puts forward suggestions for improvement. Design Intention: Skill guidance is the key link to improve students' ability to present ideas. By explaining the key points of presenting ideas and guiding students to use transition words and phrases, students can learn how to organize their language more logically and express their views more clearly and coherently. The practice link allows students to apply the skills they have learned in time, deepen their understanding and mastery of the skills, and lay a solid foundation for the subsequent group cooperation and independent presentation activities. Step 3: Practice and Application (Cooperation and Output) Activity 1: Group Discussion The teacher divides students into groups of 4-5, and assigns the task: Each group chooses a nature documentary they are familiar with (or a scientific discovery introduced in the unit, such as Darwin's evolution theory), discusses the main content of the documentary (or scientific discovery), the nature secrets it reveals, and the reasons for recommending it (or the significance of the scientific discovery). During the discussion, students should take notes, record key information, and use the vocabularies, sentence structures and transition words they have learned in this lesson. The teacher puts forward specific requirements for the group discussion: 1. Each student should actively participate in the discussion and express their own views. 2. The discussion should focus on the task and avoid irrelevant topics. 3. Students should help each other, correct each other's language mistakes, and improve the accuracy and fluency of their expression. 4. Each group should elect a representative to prepare for the group presentation. During the group discussion, the teacher walks around the classroom, observes the discussion situation of each group, provides timely guidance and help. For groups that have difficulty choosing a documentary or scientific discovery, the teacher gives suggestions, such as recommending classic nature documentaries like "Our Planet", "Life on Earth", or guiding them to review Darwin's voyage and evolution theory in the unit. For groups that have problems in language expression, the teacher helps them correct their mistakes and provides appropriate language support. For groups that have a clear discussion direction but lack logical organization, the teacher guides them to use transition words and phrases to sort out their ideas. Design Intention: Group discussion is an effective way to cultivate students' cooperative learning ability and language output ability. Through group discussion, students can exchange ideas, learn from each other, and improve their ability to express and organize ideas in English. The teacher's on-site guidance can solve the problems encountered by students in the discussion in time, ensure the smooth progress of the discussion, and help students better complete the task of preparing for the presentation. At the same time, group cooperation can also enhance students' sense of teamwork and improve their learning enthusiasm. Activity 2: Group Presentation Preparation After the group discussion, each group's representative organizes the group's ideas and key information, and prepares the group presentation. The teacher requires the presentation to include the following parts: 1. Greeting and introduction of the documentary (or scientific discovery). 2. Introduction of the main content and the nature secrets revealed. 3. Stating the reasons for recommendation (or the significance of the scientific discovery). 4. Expressing personal views on nature exploration and protection. The presentation time is 3-5 minutes per group, and students are encouraged to use body language and pictures to assist their presentation to make it more vivid and attractive. During the preparation process, the teacher continues to provide guidance. For example, the teacher helps the representatives sort out the structure of the presentation, reminds them to use the transition words and phrases they have learned, and corrects their language mistakes in the presentation draft. For students who are nervous about speaking in public, the teacher encourages them and gives them tips on public speaking, such as speaking loudly, clearly and confidently, and making eye contact with the audience. Design Intention: The preparation for group presentation is a process of integrating and applying the knowledge and skills learned in this lesson. Through organizing ideas, sorting out information and preparing the presentation draft, students can further consolidate their mastery of language knowledge and presenting skills. The teacher's guidance helps students improve the quality of their presentation, enhances their confidence in speaking in public, and lays a foundation for the smooth progress of the group presentation. Activity 3: Group Presentation and Evaluation Each group's representative takes turns to give a presentation in front of the whole class. The other students listen carefully, take notes, and evaluate the presentation according to the evaluation criteria provided by the teacher. The evaluation criteria include: 1. Clarity: Whether the content is clear and the views are distinct. 2. Logic: Whether the structure is reasonable and the transition is natural. 3. Language: Whether the vocabularies and sentence structures are used correctly and appropriately. 4. Expression: Whether the expression is fluent and confident. 5. Creativity: Whether there are unique views or creative ways of presentation. After each group's presentation, the teacher first invites 2-3 students to give their evaluations, pointing out the advantages and shortcomings of the presentation. Then, the teacher makes a summary evaluation, affirms the efforts and achievements of each group, such as the clear structure, accurate language, fluent expression, etc., and puts forward targeted suggestions for improvement. For example, if a group's presentation lacks logical transition, the teacher reminds them to use more transition words and phrases; if a group's language is too simple, the teacher suggests them to use more complex sentence structures and rich vocabularies; if a group's presentation is too short, the teacher guides them to add more details to enrich the content. At the same time, the teacher records the common problems in students' presentations, such as incorrect use of certain vocabularies and sentence structures, lack of logical organization, unclear expression, etc., and conducts centralized explanations and reviews after all groups have finished their presentations, helping students avoid similar mistakes in the future. Design Intention: Group presentation is the key link to test students' learning effect and language output ability. Through presenting in front of the whole class, students can improve their oral expression ability and public speaking ability, and enhance their confidence in using English. The evaluation link not only helps students learn from each other, find their own shortcomings, but also cultivates their critical thinking ability. The teacher's summary evaluation and centralized explanation can help students further consolidate their knowledge and skills, and solve the common problems in their expression, so as to improve their ability to present ideas in English. Step 4: Consolidation and Extension (Deepening and Application) Activity 1: Individual Writing Practice On the basis of group presentation, the teacher assigns an individual writing task: Write a short passage (about 100-120 words) to introduce a nature documentary you like or a scientific discovery you are interested in, and express your views on nature exploration and protection. The teacher requires students to use the vocabularies, sentence structures and transition words they have learned in this lesson, and pay attention to the clarity, logic and accuracy of the passage. During the writing process, the teacher walks around the classroom, observes students' writing situation, provides timely guidance and help. For students who have difficulty starting to write, the teacher gives them a writing outline, such as: 1. What is the name of the documentary/scientific discovery? 2. What is the main content? 3. What nature secrets does it reveal? 4. What is your view on it? For students who have problems in language expression or grammar, the teacher helps them correct their mistakes and provides appropriate language support. For students who finish writing early, the teacher asks them to check their own passages, pay attention to spelling, punctuation and grammar mistakes, and improve the quality of their writing. After students finish writing, the teacher collects some representative passages (including excellent passages and passages with common problems), displays them on the screen, and comments on them. For excellent passages, the teacher affirms their advantages, such as clear structure, accurate language, fluent expression, and asks students to learn from them. For passages with common problems, the teacher guides students to find and correct the mistakes together, helping them deepen their understanding of language knowledge and improve their writing ability. Design Intention: Writing practice is an important way to consolidate students' language knowledge and improve their written expression ability. By writing a short passage, students can further integrate and apply the vocabularies, sentence structures and presenting skills they have learned in this lesson, and improve their ability to organize and express ideas in written English. The teacher's on-site guidance and post-writing comments help students solve the problems encountered in writing, correct their mistakes, and improve the quality of their writing. At the same time, displaying representative passages allows students to learn from each other and make common progress. Activity 2: Theme Discussion The teacher raises a theme discussion question: "With the development of science and technology, human beings have made more and more discoveries about nature. What impact do these discoveries have on human beings and nature? What should we do to balance nature exploration and environmental protection?" Students are invited to express their views freely. The teacher guides them to use the knowledge and language they have learned in this lesson to express their views, and encourages them to put forward their own suggestions. For example, some students may say that scientific discoveries help us understand nature better and promote the development of human society, but some human activities caused by these discoveries may damage the environment. Therefore, we should explore nature in a scientific and rational way and take measures to protect the environment. Other students may put forward specific suggestions, such as reducing pollution, protecting wild animals and plants, and strengthening environmental education. During the discussion, the teacher pays attention to guiding students to think deeply, encourages them to express different views, and helps them form a correct view of nature and environmental protection. The teacher also helps students correct their language mistakes in the discussion, and guides them to use more accurate and appropriate language to express their views. Design Intention: Theme discussion helps students deepen their understanding of the theme of the unit, connect the knowledge learned in the lesson with real life, and cultivate their sense of social responsibility and environmental protection awareness. By expressing their views freely, students can further improve their oral expression ability and critical thinking ability, and form a correct view of nature and environmental protection. At the same time, the discussion also enriches the content of the lesson, makes the teaching more close to real life, and improves students' learning enthusiasm and participation. Step 5: Summary and Homework (Summary and Consolidation) Activity 1: Lesson Summary The teacher summarizes the content of this lesson with the students. First, the teacher reviews the key points of this lesson: 1. The structure and skills of presenting ideas about nature exploration and nature documentaries. 2. The core vocabularies, sentence structures and transition words used in presenting ideas. 3. The methods of expressing personal views on nature exploration and environmental protection. Then, the teacher affirms the performance of the students in this lesson, praises the groups and individuals who performed well in the group discussion and presentation, and encourages all students to continue to practice and improve their ability to present ideas in English. Finally, the teacher emphasizes the significance of this lesson: Through this lesson, we not only improve our English language skills but also deepen our understanding of nature, and form a sense of environmental protection. We should use our knowledge and actions to protect nature and explore the secrets of nature in a scientific way. Design Intention: Lesson summary helps students sort out the knowledge and skills learned in this lesson, deepen their understanding and memory, and form a systematic knowledge framework. Affirming students' performance can enhance their learning confidence and enthusiasm, and encouraging them to practice can promote them to apply the knowledge and skills learned in the lesson to daily learning and life. Emphasizing the significance of the lesson helps students establish a correct view of nature and environmental protection, and realize the educational value of the lesson. Activity 2: Homework Arrangement The teacher assigns the following homework: 1. Revise the short passage written in class, improve its content and language, and hand it in the next class. 2. Watch a nature documentary (in English if possible), take notes of the key content, and prepare a 2-minute oral presentation for the next class. 3. Preview the Reflection section of the unit, and think about what you have learned in this unit and what you need to improve. The teacher explains the requirements of the homework clearly: For the revised short passage, students should pay attention to the clarity, logic and accuracy of the content and language, and use the vocabularies, sentence structures and transition words learned in this lesson. For the oral presentation preparation, students should focus on the main content of the documentary and the nature secrets it reveals, and practice their oral expression fluently. For the preview, students should carefully review the content of the unit and make a self-evaluation of their learning effect. Design Intention: Homework is an important link to consolidate the learning effect of the lesson and extend the learning content. Revising the short passage helps students further improve their written expression ability. Watching English nature documentaries and preparing oral presentations can help students expand their vocabulary, improve their listening and oral expression ability, and deepen their understanding of the theme of the unit. Previewing the Reflection section helps students review the unit content in time, make self-evaluation, and clarify their learning goals and direction for improvement. 1 / 1 学科网（北京）股份有限公司 学科网（北京）股份有限公司 学科网（北京）股份有限公司 $