Unit 5 A delicate world Understanding ideas 教案-2022-2023学年高中英语外研版（2019）选择性必修第二册

Unit5 A delicate world Period2 Understanding ideas教案 Topic MACQUARIE ISLAND:from Chaos to Conservation Teacher Teaching Aims: 1.Lead the students to understand what happened on Macquarie Island. 2.Develop the students’ reading skills and enable them to learn how to use different reading strategies to read different reading materials. 3.Enable students to understand the whole passage. Teaching important Points: 1. Guide the students to predict the main content of the text and get the general idea . 2. Let the students master the key words and phrases in this part. 3.Guide the students to find out the author's purpose of writing and say the reason Teaching difficult points: 1.Let the students learn to analyze and solve problems ,and improve their reading level. 2.Guide the students to analyze human intervention behavior,purpose and impact on Macquarie Island. Teaching methods: Task-based Language Teaching Question-inquiry Teaching Teaching type: Reading 课 时 one Teaching procedure: Teaching contents: Step1: Pre-reading Step2: While-reading Step3: Post-reading Summary Homework Task 1:Ask the students to look at the pictures independently and name the animals they see in the pictures. Task2: Ask the students to discuss the two questions and share their answers. Questions: 1. What animals can you see in the picture? 2. What kind of changes would take place if cats, rats and rabbits were introduced to an environment like his? Answers: 1. Students' own answers. 2. They would hunt the birds and eat the native vegetation, thus upsetting the local ecological balance. Activity 1: Skimming:Guide the students to read the passage and find out what happened to Macquarie Island. Answers: Non-native species introduced to Macquarie Island attacked native birds,and led to a substantial reduction of bird population and even the extinction of parakeets. In addition, non-native species ate and devastated the native vegetation.All of this played a part