【同步课堂-视频】主讲：王会群 英语人教课标版九年级--Unit9 When was it invented Selfcheck

Unit 9 When was it invented? Period 3 Step I Check the homework (2: P73) T: Have you finished your homework? Have you found out when these things on P73 were invented and who they were invented by? Sample answers: The abacus was invented in the sixth century by Chinese people. The umbrella was invented about 4000 years ago in Assyria, China and Egypt. In Italy in 1854 , Ignatio Porro invented the binoculars. The bicycle was invented in the 1880s in England. The Camera was invented by Joseph Nicephore Niepce in 1827. The inventor took the first picture in the world. Step 2 Practice the vocabulary and grammar (1: P73) Ask the students to finish the exercise of Part 1 of Self check. T: We have learnt four words about different kinds of tastes. What are they? S: They are sour, sweet, salty and crispy. T: Good. Please turn to P73, Part 1. Fill in the blanks with the right tastes. After the students finish it, ask one of them to read the complete sentences to check the answers. T: We’ve also learnt two articles about potato chips and tea. Next complete the following two cloze tests to have a review of them. Don’t refer to your textbooks. OK? Give the students 10 minutes to finish the two tests. Cloze test 1: Did you know that potato chips were invented ______ ______? It says that they were invented _____ a chef called George Crum in 1853. One day a customer in the restaurant where George worked sent back his plate of fried potatoes because he said they were cut too thick. George was in a bad mood, so he cut the potatoes really, really thin, and he cooked them for a long time until they were _____. And he _______ lots of salt on them so they were really ______. He thought the customer would hate them. But the customer loved them and asked for more. He told other customers about them, and soon everyone was ordering thinly-sliced, crispy, salty potato chips. ______ ______ _______, they became popular. Cloze test 2: Did you know that tea, the most popular drink