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

Unit 7 The natural world Reading 教学设计 I. Teaching Objectives 1. Knowledge Objectives Students will understand the article about the earth’s main ecosystems (oceans, wetlands, forests), mastering vocabulary like ecosystem, balance, oxygen, pollution. Students will extract details to answer comprehension questions and analyze ecosystem roles. 2. Ability Objectives Improve reading skills: identifying ecosystem features, answering questions, completing audio scripts. Enhance critical thinking by discussing ecosystem importance and human impacts. 3. Affective Objectives Inspire appreciation for the vital roles of oceans, wetlands, and forests in the natural world. Encourage students to reflect on human responsibility in protecting these ecosystems. II. Language Knowledge 1. Key Words & Phrases Ecosystem roles: “heart” (ocean), “kidneys” (wetlands), “lungs” (forests); Vocabulary: balance, oxygen, pollution, carbon dioxide; Descriptions: covers 71% of surface, traps pollution, produces oxygen 2. Key Sentences “An ecosystem includes all the living and non-living things in an area. Ecosystems can be of different sizes, from small ponds to large grasslands.” “The ocean is very large, covering around 71% of the earth’s surface and producing about 70% of the earth’s oxygen.” 3. Key and Challenging Points Key Points: Comprehend each ecosystem’s role (ocean as “heart,” wetlands as “kidneys,” forests as “lungs”); answer text - based questions. Challenging Points: Interpreting metaphorical roles (e.g., “kidneys of the earth”); analyzing human impacts on ecosystems. III. Teaching Procedures (Total Duration: 45 Minutes) Step 1 Pre - reading (5 Minutes) Show the article title “The earth’s main ecosystems” and ask: “What’s in an ecosystem? What do you know about oceans, wetlands, forests?” Introduce the task: “Today, we’ll explore how oceans, wetlands, and forests work—learning why they’re called the ‘heart,’ ‘kidneys,’ and ‘lungs’ of the earth!” Step 2 While - reading (18 Minutes) Activity 1: Ecosystem Descriptions (7 Minutes) Students match pictures to ecosystem roles (Activity A), using clues like “covers 71%” (ocean), “cleans water” (wetlands). Walk around to assist, explaining metaphors (e.g., “kidneys clean blood → wetlands clean water”). Activity 2: Comprehension Questions (8 Minutes) Students answer text - based questions (Activity B), focusing on ecosystem components and roles. Discuss answers, highlighting non - living elements (e.g., water, air) and their importance. Activity 3: Vocabulary Check (3 Minutes) Quick review of key words (e.g., “balance”—stability; “pollution”—harmful substances; “oxygen”—air for breathing). Step 3 Post - reading (15 Minutes) Activity 1: Podcast Script Completion—Activity C (10 Minutes) Students fill in the ocean ecosystem podcast (Activity C) with vocabulary (e.g., “surface,” “oxygen,” “balance”). Highlight ecosystem roles (ocean produces oxygen, traps CO₂). Discuss answers, connecting to the article’s “heart of the earth” metaphor. Activity 2: Critical Reflection (5 Minutes) Use discussion questions: “Why are these ecosystems important? How do humans affect them?” Groups share ideas, linking to pollution (e.g., plastic in oceans) and deforestation. Step 4 Summary & Homework (7 Minutes) Summary (4 Minutes): Recap ecosystem roles (ocean: heart, wetlands: kidneys, forests: lungs), and their importance for balance, oxygen, and clean air/water. Homework (3 Minutes): Writing: Describe one ecosystem’s role in 3 sentences, using metaphors (e.g., “Forests are the lungs—they breathe in CO₂, breathe out oxygen”). Research: Find one human action harming an ecosystem and one solution. IV. Assessment of Teaching Effectiveness Check Activity A/B answers for understanding of ecosystem roles and details. Evaluate Activity C script for accurate vocabulary use. Observe post - reading discussions for critical thinking about ecosystem protection. V. Design Purpose Pre - reading: Activate prior knowledge about ecosystems, building empathy for their complexity. While - reading: Practice role identification and comprehension, core skills for informational texts. Post - reading: Apply vocabulary in a podcast script and reflect on human impacts, linking to real - world responsibility. VI. Blackboard Design Unit 7 Reading—Earth’s Main Ecosystems Ecosystem Roles: - Ocean: “Heart” (71% surface, 70% oxygen) - Wetlands: “Kidneys” (cleans water, prevents floods) - Forests: “Lungs” (absorbs CO₂, produces oxygen) Key Vocabulary: balance, oxygen, pollution, carbon dioxide Homework: Write about ecosystem roles! VII. Teaching Reflection Strengths: Ecosystem metaphors (heart, kidneys, lungs) make complex roles accessible; activities balance skills and environmental awareness. Weaknesses: Some students may struggle to grasp metaphorical language (e.g., “kidneys of the earth”). Improvements: Add a “metaphor matching” game: Match ecosystem metaphors to their functions (e.g., “lungs” → cleans air). This reinforces understanding of symbolic roles. 学科网（北京）股份有限公司 $$