【正文】
Unit 1 Great scientists Period One Teaching aims: 1. Promote the Ss to know sth. about great scientists. 2. Learn some new words and expressions. 3. To examine a new scientific idea. 4. Comprehension. Main points: Warming up and Reading passage Difficult points: Comprehension Teaching procedures: Step 1. Warming up 1. Show the Ss some pictures of great scientists and ask them to talk about them. 2. The Ss discuss in groups and walk along to offer them help if needed. 3. Work out their answers by themselves. 4. Check their answers. Step 2. Prereading 1. The Ss discuss the stages in examining a new scientific idea in pairs by asking the questions in the prereading. 2. Ask the Ss to put them in order and get their answers. Step 3. Reading passage 1. Let the Ss go over the passage and try to find the hard words, expressions and sentences they have. 2. Explain the difficulties. 3. Ask the Ss to read the passage more carefully and then try to plete the chart in the prehending by discussing in groups. 4. Choose some Ss to answer the questions in the prehending. 5. Ask the Ss to choose one of the paragraphs to read aloud fluently. Step 4. Homework Read the passage again and go over Learning about language. Period Two Teaching aims and demands: 1. Discover the useful words and expressions. 2. Learn and improve the use of useful words and expressions. Main points: Learn to use the words and expressions that the Ss discover. Difficult points: Improve the us