Unit 7 The natural world Welcome to the unit 教学设计-2025-2026学年译林版八年级英语上册

该初中英语教学设计聚焦生态系统（雨林、珊瑚礁等）的事实及核心词汇（ecosystem等）、句型（Do you know anything about...?），通过自然场景图片导入，提问“什么是生态系统？能说出不同类型吗？”，激活学生已有认知，引出“学习生态系统事实并讨论特征”的任务，搭建从已知到新知的学习支架。 特色在于融合语言能力与环保意识培养，通过“阅读事实检查-小组对话-拓展分享”递进活动。阅读环节识别已知事实提升信息提取能力，对话活动用模型句型讨论生态系统特征（如“雨林有半数动植物”）强化表达，拓展分享鼓励挖掘新事实（如湿地净水作用）发展学习能力。助力学生提升综合语言能力与生态保护意识，教师可借层次分明的活动与多元评估（课堂观察、作业反馈）高效教学。

Unit 7 The natural world Welcome to the unit 教学设计 I. Teaching Objectives 1. Knowledge Objectives Students will understand fun facts about ecosystems (rainforests, coral reefs, grasslands, polar ice), mastering vocabulary like ecosystem, rainforest, coral reef, grassland, polar ice. Students will be able to discuss ecosystems, using expressions from the model conversation. 2. Ability Objectives Improve reading skills by identifying known ecosystem facts. Enhance speaking skills through pair discussions about ecosystems and their features. 3. Affective Objectives Foster appreciation for the diversity and importance of ecosystems in the natural world. Encourage students to observe and care about environmental protection by understanding ecosystems. II. Language Knowledge 1. Key Words & Phrases Ecosystem types: rainforest, coral reef, grassland, polar ice; Descriptive words: diverse, supportive, dry, extreme; Expressions: Do you know anything about...? What’s your knowledge of...? 2. Key Sentences “Half of the world’s animals and plants live in rainforests.” “Do you know anything about ecosystems, David? I know that grasslands in different places are home to different animals.” 3. Key and Challenging Points Key Points: Comprehend ecosystem facts and descriptions; use target expressions in discussions. Challenging Points: Accurately recalling and explaining ecosystem features; distinguishing between different ecosystem types. III. Teaching Procedures (Total Duration: 45 Minutes) Step 1 Introduction to Ecosystems (7 Minutes) Show the unit title “The natural world” and the opening picture of a natural scene. Ask: “What is an ecosystem? Can you name different types of ecosystems?” Introduce the task: “Today, we’ll learn fun facts about ecosystems and discuss their features, discovering the beauty of the natural world!” Step 2 Reading & Fact - Checking—Activity A (12 Minutes) Pre - reading: Explain unfamiliar ecosystem terms (e.g., “coral reef”—underwater ecosystem with coral; “grassland”—area with mostly grass). While - reading: Students read the ecosystem facts (Activity A) and tick the ones they already know. Post - reading: Check answers together, discussing each ecosystem’s features: Rainforest: Home to half of the world’s plants and animals. Coral reef: Looks like rocks but supports much life in a small area. Grassland: Lies between deserts and forests. Polar ice: Home to polar bears and penguins. Step 3 Pair Discussion—Activity B (15 Minutes) Model Conversation: Read the sample dialogue (Kitty & David) with students. Highlight phrases like “Do you know anything about...? I know that... Do you know anything about...?” Group Task: Students work in pairs. Discuss ecosystems, using the model (Activity B). Prompts: “I know that deserts are very dry. What about rainforests?” Share - out: Invite 2–3 pairs to present their conversations. Provide feedback on expression use and accuracy of ecosystem descriptions. Step 4 Sharing More Facts—Activity C (8 Minutes) Ask students: “What other fun facts about ecosystems do you know?” (Activity C). Students write down their ideas first, then share in small groups. Encourage using ecosystem - related vocabulary (e.g., “Wetlands are important for water purification; Mangroves protect coastlines.”). Step 5 Summary & Homework (3 Minutes) Summary (2 Minutes): Recap ecosystem types, key facts, and discussion phrases (e.g., “Rainforests have diverse life; grasslands lie between deserts and forests”). Homework (1 Minute): Research: Find one more fun fact about an ecosystem not in the unit. Writing: Write 3 sentences about an ecosystem you find interesting, using descriptive words. IV. Assessment of Teaching Effectiveness Check Activity A answers for understanding of ecosystem fact recognition. Observe pair discussions (Activity B) for use of target expressions and accurate ecosystem descriptions. Review homework (ecosystem research and writing) to evaluate independent learning and extension. V. Design Purpose Introduction: Connect to students’ prior knowledge of ecosystems, building relevance to environmental protection. Reading/Fact - Checking: Deepen understanding of ecosystem diversity and features, improving reading skills. Discussion: Practice speaking with structured expressions, encouraging appreciation for the natural world. Reflection: Link learning to personal knowledge and research, fostering awareness of ecosystem importance. VI. Blackboard Design Unit 7 Welcome to the unit—Ecosystems Ecosystem Types & Facts: 1. Rainforest: Half of world’s plants/animals 2. Coral reef: Supports life in small area 3. Grassland: Between deserts & forests 4. Polar ice: Home to polar bears/penguins Discussion Phrases: “Do you know anything about...? I know that... What about...?” Homework: Research a new ecosystem fact! VII. Teaching Reflection Strengths: Ecosystem theme is engaging and relevant to environmental protection; activities connect to knowledge building and discussion. Weaknesses: Some students may struggle to recall detailed ecosystem facts. Improvements: Add an “ecosystem poster” activity: Have students create posters for an ecosystem, including facts and drawings. This visualizes learning and reinforces memory. 学科网（北京）股份有限公司 $$