Unit 3 Conservation-Lesson 2 War on Plastic Packets 教案-2025-2026学年高中英语北师大版选择性必修第一册

Unit 3 Conservation-Lesson 2 War on Plastic Packets 教学目标和重难点 教学目标 Students master environmental vocabulary, grasp listening strategies, analyze plastic pollution issues critically, enhance eco-awareness, and develop cooperative learning and problem-solving abilities in English. 教学重难点 Key Points: Master vocabulary about plastic pollution, identify speakers’ opinions in listening, and express views on reducing plastic waste. Difficult Points: Use accurate expressions to discuss solutions logically and reflect on personal plastic use practically. 教学过程 Step 1 Lead-in Start the class by showing several pictures of daily plastic packets, including plastic-wrapped fruits, disposable plastic bags and snack packages. Ask students to share how often they use plastic packets in daily life and what problems they think plastic packets may bring. Encourage free expression and record typical answers on the blackboard. This activity activates students’ prior knowledge and arouses their interest in the topic of plastic pollution, laying a foundation for the following listening and learning. Guide students to think about the widespread use of plastic packets and connect the topic to their life experience, helping them naturally enter the theme of “War on Plastic Packets”. Step 2 Pre-listening First, present key vocabulary and phrases related to the lesson, such as plastic packet, pollution, recycle, disposable, biodegradable, environmental impact, single-use, alternative, wrap, waste, do away with. Explain the meanings and usage of these words clearly, and let students read aloud to memorize them. Then, introduce the listening strategy of identifying speakers’ opinions, telling students that they need to catch key words and tone to judge different views during listening. Next, show two characters, Kevin and Alicia, who will appear in the audio, and ask students to predict what they might talk about plastic packets. Let students discuss in pairs and share their predictions. This step helps students familiarize with vocabulary, master basic listening skills, and make predictions based on the topic, which reduces listening difficulty and improves their ability to obtain information effectively. Ensure students can recognize and use core vocabulary correctly, so they can follow the audio smoothly and prepare for understanding different opinions in the listening material. Step 3 While-listening Activity 1 Listening for the main idea Play the audio for the first time and ask students to answer two basic questions: What are Kevin and Alicia mainly talking about? What is Kevin’s attitude towards plastic-wrapped products? After listening, invite students to share answers and check them briefly. This activity helps students grasp the general idea of the audio and understand the core topic of the conversation, training their ability to obtain overall information in listening. Activity 2 Listening for specific information Play the audio for the second time and ask students to finish a matching task: match statements to Kevin or Alicia according to what they hear. The statements include “It is stupid to wrap coconuts in plastic.” “Using recycled packaging is a good way.” “We should take our own bags instead of using plastic ones.” Let students listen carefully and mark the corresponding letters. Then play the audio for the third time and ask students to answer detailed questions: What does Kevin see in the supermarket? Why does he think it is wrong? What solutions does Alicia put forward? What is Kevin’s suggestion? After listening, check answers one by one, explain key sentences that students may not understand, and emphasize the key information reflecting speakers’ opinions. Guide students to pay attention to logical words and emotional words in the conversation, which help identify different views. This step trains students’ ability to catch specific details and distinguish different opinions, consolidates the listening strategy learned before, and deepens their understanding of the audio content. Activity 3 Listening for logical relations Play the audio again and ask students to sort out the logic of the conversation: how the topic starts, how the two people express their opinions, and how they put forward solutions. Let students discuss in groups of four and summarize the conversation structure. This activity helps students understand the logical connection of the listening material, improves their analytical ability, and lays a foundation for language output and expression. Step 4 Post-listening Activity 1 Language focus and analysis Select key sentences from the listening material to analyze sentence structures and useful expressions, such as “It is a waste of money and resources.” “We should take action to cut down the use of plastic packets.” “Using alternative materials can help reduce pollution.” Explain the usage of these sentences and let students practice substitution drills with different subjects and objects. For example, change “plastic packets” to “disposable chopsticks” and make new sentences. This step helps students master practical sentence patterns, accumulate language input, and improve their language organization ability. Activity 2 Group discussion Divide students into groups and set three discussion topics: What are the serious environmental problems caused by plastic packets? What can we do to reduce the use of plastic packets in daily life? Should shops stop providing free plastic packets completely? Ask each group to choose one topic, discuss actively, and record key points. Encourage students to use the vocabulary and sentences learned in class to express their ideas. Walk around the classroom to guide students, help them correct improper expressions, and inspire them to think deeply. After discussion, invite group representatives to share their opinions with the whole class. Praise excellent expressions and supplement reasonable ideas. This activity trains students’ oral expression ability, cultivates their critical thinking by analyzing environmental problems, and enhances their awareness of environmental protection through discussing solutions. Activity 3 Critical thinking and reflection Put forward two deep-thinking questions: Is it possible to completely ban plastic packets in modern life? How can we balance daily convenience and environmental protection? Let students think independently first and then share their views freely. Guide students to look at the problem from multiple perspectives, not only seeing the harm of plastic packets but also considering their practical functions, and form a rational and objective attitude. This step improves students’ thinking quality, helps them establish a correct view of environmental protection, and connects language learning with real-life issues. Step 5 Language output Activity 1 Role-play Ask students to work in pairs and create a short conversation based on the listening material. One student acts as Kevin and the other as Alicia, and they can add their own ideas about reducing plastic waste. Provide necessary guidance and remind students to use the vocabulary and sentences learned. After preparation, invite several pairs to perform in front of the class and give positive feedback. This activity consolidates listening content, exercises students’ oral English application ability, and enhances their confidence in English communication. Activity 2 Mini-writing Assign a short writing task: write a short paragraph of about 80 words to introduce the harm of plastic packets and at least two ways to reduce plastic use. Require students to use the words and sentences learned in class and organize language logically. Collect some typical works after writing, display them in class, point out advantages and areas that need improvement, and help students polish their writing. This step realizes the transformation from language input to output, improves students’ writing ability, and deepens their mastery of knowledge. Step 6 Summary and homework Summary Lead students to review the key vocabulary, listening strategies and useful expressions learned in class. Summarize the main opinions about plastic packets in the listening material and emphasize the importance of environmental protection. Encourage students to put what they have learned into practice and reduce plastic use in daily life. Homework Listen to the audio again and read it aloud to improve pronunciation and intonation. Finish the writing task carefully and revise it with the help of classmates. Interview family members about their use of plastic packets and write a short report in English. This teaching procedure takes students as the main body, integrates language learning with environmental education, trains students’ listening, speaking and writing skills comprehensively, and cultivates their core qualities such as language ability, thinking quality, cultural awareness and learning ability throughout the process. 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 $