广东省阳东广雅学校高中英语《Unit2 Working the land》教案（3）新人教版必修4.doc

period 3 using languageteaching goals 教学目标1. enable ss to master the main idea of the text and know the ways of organizing articles.2. help ss learn how to enlarge the words and structures of the same topic.teaching important and difficult points 教学重难点1. how to grasp the main idea of the passage.2. how to grasp the words and phrases and be able to use them freely.teaching procedures & ways 教学过程与方法steplook at the pictures.what is the substance we put on the soil which makes crops grow?how many kinds of fertilizers do farmers use? which kind do farmers use when they are doing organic farming?do you know about organic farming? stepreading1. scan the passage and get the main idea.chemical fertilizers can cause many problems, so organic farming is becoming more popular.2. answer the following questions after read the passage.1. why are chemical fertilizers so popular in farming today? 2. what problems can be caused by using chemical fertilizers? 3. what is organic farming? 4. what is the main reason for using organic farming methods? keys: 1. they are a great way to stop crop disease and increase production. 2. they can damage the land by killing helpful bacteria and pests and by staying in the ground and underground water for a long time. they damage peoples health by building up in their bodies and leading to cancer or other illnesses. 3. organic farming means growing crops without using any chemicals. 4. the main reason for using organic farming methods is to grow good food and to avoid damaging the environment or peoples health. 3. read the passage carefully and fill in the blanks.chemical farmingadvantagesstopping crop disease and increase _chemical farmingdisadvantagesdamaging the land: killing the helpful _ damaging peoples health:many chemicals in the food supply can lead to cancer or other illnesses.food grows too fast to be full of much _.organic farming_to grow good food and avoid damaging the environment or peoples healthorganic farmingmethodsusing _ waste from animals as fertilizerchanging _ in each field every few years using _ of soil to plant crops planting _ between cropsstep projectpersuade farmers to grow the crops by organic farming with the knowledge learnt. what is organic farming? what fertilizer should they use? why? how to plant the different crops? .step language pointsstep listening1. what is the main topic of the conversation?the possible bad effects of chemical fertilizers on the fruit and vegetables that we eat today. 2. listen to the dialogue a second time. decide if the following statement are true or false. 1. paul thinks that carrie is not telling him the truth.2. using chemical fertilizers always makes vegetables empty inside.3. todays fruit is not as healthy for people as fruit fifty years ago. 4. eating more vegetables might not always be good for us.5. all of todays vegetables look healthy but in fact are not. keys: t, f, t, f, tstep homeworkwrite a summary of this passage following the procedure.step 1: skim the passage to find its main idea. write it down in your own words.step 2: find and underline the topic sentence of each paragraph. rewrite each topic sentence, using your own words. do not