译林版（2019）必修 第三册Unit 1 Nature in the balance Reading (II) 教学设计

Unit 1 Nature in the balance Reading (II)（教学设计） I. Learning objectives By the end of the lesson, students will be able to: 1. understand the usage of the following words and expressions: a huge sea of, alive with, play a significant role in, including, variety, while, a number of, survive, in turn, impact; 2. use the above words and expressions in new situations; 3. understand the negative prefixes un-, dis-, in-/im-/il-/ir-, non-; 4. present figures by making comparisons with familiar places or objects. II. Key competence focus 1. Understand some new words and expressions. 2. Use the new words and expressions in new situations. III. Predicted area of difficulty Use the new words and expressions in new situations properly and correctly. IV. Teaching procedures Step 1 Lead-in T asks Ss to review the documentary script by completing a summary. T shows Ss the structure and some keywords to help them summarize the text. T: Hello, everyone! In the first period of this unit, we’ve learned a documentary script about the Amazon rainforest. Today we’ll review the text, appreciate the language in it, discuss how to use some of the words and phrases, and practise using them in new situations. T: Would you please summarize the text according to the following keywords Size: the largest rainforest in the world; an area of around 6 million square kilometres Plant species: more than 40,000; different levels Species of birds and mammals: more than 1,300 species of birds and over 400 species of mammals; jaguars and the food chain Values: fixes carbon and produces over 20% of all the Earth’s oxygen; a treasure house of species Threats: 17% of the rainforest lost due to human activities 【设计意图：回归课本，教师给出语言支架，要求学生概括文章内容，帮助学生回忆前一日所学文章内容；培养学生的语言概括能力，为概要写作打下基础。】 Step 2 Group work T assigns the 5 paragraphs of the text to 5 different groups. T: Do you have any difficulties in reading the documentary script, including the words, phrases and sentences, etc Now, we’ll work in groups to discuss and share our learning notes. 【设计意图：让学生找出语篇的语言重难点，鼓励学生开展自主学习和小组合作学习，借助词典等工具书解决疑惑拓展新知，培养学生的学习能力，为下一步讲解语篇中重点语言知识做准备。】 Step 3 Language comprehension and extension T asks Ss to present their difficulties on the blackboard and share their learning notes. During their presentations, T makes necessary extension. T: Now, let’s welcome some students to share what they have got by studying individually and cooperatively. Paragraph 1 (1) Welcome to the jungle, a huge sea of green alive with the sounds of animals. (page 2, line 1) A huge sea of: a lot of, plenty of Alive with: be full of things that are alive T: Now, boys and girls, please translate the following sentences. (2) As the largest rainforest in the world, it plays a significant role in maintaining the fine balance of the Earth’s ecosystem. (page 2, lines 2–3) T: Can you g ... ...