Unit 3 The World of Science-Presenting ideas 教案-2025-2026学年高中英语外研版必修第三册

Unit 3 The World of Science-Presenting ideas 内容导航 This section guides students to discuss the evolution of household appliances, predict future changes of daily electronic devices, and deliver structured English presentations integrating scientific vocabulary, logical reasoning and critical thinking about technology and life. 教学目标和重难点 1. 教学目标 Students master scientific vocabulary and presentation structures to improve accurate expression. They understand global scientific ethics and technological values to shape cultural awareness. Critical and creative thinking is cultivated to analyze tech impacts. Autonomous cooperative learning and reflection enhance learning strategies and efficiency. 2. 教学重难点 Key points: command of science-related expressions, clear presentation structure, logical idea organization. Difficult points: coherent English delivery, critical analysis of technology’s dual effects, creative future-tech prediction with sufficient evidence and fluent expression. 教学过程 Step 1 Lead-in Teacher shows pictures and short videos of early and modern household appliances, such as telephones, computers and washing machines. Students observe and share the changes they notice. Teacher raises guiding questions: How have these devices changed our life? What might they be like in decades?Design Intent: Create a real-life context to activate prior knowledge, arouse curiosity about scientific and technological development, and naturally lead to the topic of presentation. Step 2 Language Input & Vocabulary Building Teacher presents key words and phrases about technology, evolution, functions and predictions, including evolve, intelligent, portable, efficient, sustainable, be equipped with, make a difference, it is likely that, there is no doubt that. Teacher explains usage and collocations with example sentences. Students repeat and make their own sentences.Design Intent: Lay a solid language foundation for presentations, ensure students use accurate and rich expressions, and reduce obstacles in oral output. Step 3 Structure Analysis of a Presentation Teacher shows a short sample presentation about future mobile phones. Students read and underline the structure: opening (topic introduction), body (development history, current features, future predictions), closing (summary and significance). Teacher summarizes three core parts: clear thesis, supporting details, logical connection words.Design Intent: Help students grasp presentation framework, organize ideas systematically, and improve coherence and completeness of expression. Step 4 Group Discussion & Idea Drafting Students are divided into groups of four. Each group chooses one daily appliance, such as smart watches, refrigerators or robots. Groups discuss three aspects: past and present changes, advantages and problems, future changes in 50 years including appearance, functions and influence on life. Students take notes and outline key points.Design Intent: Cultivate cooperative learning ability, inspire critical and creative thinking, and collect sufficient materials for personalized presentations. Step 5 Draft Polishing & Language Optimization Groups organize notes into complete presentation drafts. Teacher walks around to offer guidance on logic, vocabulary and grammar. Students replace simple expressions with advanced ones and add linking words like firstly, besides, therefore, in conclusion to make the text smooth.Design Intent: Improve students’ ability to organize language independently, enhance expression accuracy and professionalism, and develop self-correction awareness. Step 6 Peer Feedback & Practice Groups practice reading presentations aloud. They exchange drafts and use a feedback sheet: clear structure, rich vocabulary, fluent sentences, reasonable predictions. Students give positive comments and constructive suggestions. Groups revise drafts according to feedback.Design Intent: Train students’ listening and evaluating abilities, promote mutual learning, and help students find deficiencies and improve content quality. Step 7 Class Presentation & Teacher Assessment Group representatives take turns to deliver presentations. Other students listen carefully and take simple notes. After each presentation, the teacher comments on strengths and areas to improve, praises creative ideas and excellent expressions, and emphasizes key points of public speaking.Design Intent: Provide a platform for students to show achievements, enhance confidence in English expression, and consolidate learning effects through timely evaluation. Step 8 Summary & Extension Teacher leads students to review key vocabulary, presentation structure and thinking methods. Teacher emphasizes that science and technology serve life and students should hold a rational attitude towards technological development. Teacher assigns homework: polish presentations and record videos; read articles about future technology and collect more expressions.Design Intent: Consolidate classroom learning, guide students to think deeply about the relationship between science and life, and extend learning to after-class to improve comprehensive literacy. Step 9 In-depth Thinking & Critical Discussion Teacher raises further questions: Will over-reliance on smart devices bring negative effects? How to balance technological innovation and ethical norms? Students express personal opinions freely in English. Teacher guides students to analyze from multiple perspectives and respect different views.Design Intent: Develop critical thinking, deepen understanding of the unit theme, and connect language learning with real-world issues to improve comprehensive quality. Step 10 Emotional Attitude Guidance Teacher shares stories of scientists who stick to exploration and innovation. Students understand the importance of curiosity, perseverance and responsibility in scientific progress. Teacher encourages students to care about technological development and aspire to contribute to social progress.Design Intent: Integrate emotional education into language teaching, shape correct values, and inspire students’ scientific spirit and sense of social responsibility. Step 11 Comprehensive Application & Creation Students combine what they have learned to create a short English poster or a three-minute speech about “Technology Makes Life Better”. They can add pictures or simple diagrams to make works vivid. Selected works are displayed in class.Design Intent: Promote the integration of knowledge and skills, improve students’ comprehensive application and creative expression abilities, and enhance learning interest and sense of achievement. Step 12 Reflection & Evaluation Students reflect on their learning performance: vocabulary mastery, presentation skills, participation in discussion, cooperation with group members. Teacher gives overall evaluation and encouragement, and puts forward targeted improvement suggestions for future learning.Design Intent: Help students form good learning habits, enhance self-awareness, and promote continuous progress in English learning and core competencies. 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 $