人教版高中英語必修2教案Unit 3 Computer

joining a computer network is the same as joining a community. small systems are like villages, where new members are formally welcomed. the larger networks, the source and compuserve, for example, are cities-anonymous, full of life and events, but difficult to fit into. iii. reading   1. listening and reading to the recording of the text who am i? turn to page 18 and listen and read to the recording of the text. pay attention to the pauses, pronunciation and intonation of the native reader. 2. reading aloud and underlining expressions now we are to read the text once again and underline all the expressions in the text. put them down into your notebook after class as homework. collocations from who am i? begin as…, a calculating machine, be built as…, follow instructions from…, sound simple, at the time, a technological revolution, write a book, make…work, solve problems, become huge, had artificial intelligence, go back to…, the size of…, go by, change size, become small and thin, get quick, stand there by oneself, be connected by…, share information by…, talk to…, bring…into…, deal with…, communicate with…, serve the human race 3. reading, identifying and settling attention, please! it is time to skim the text one more time and identify the difficult sentences. try analyzing the structures of the difficult sentences and discuss them among your group members. you may also put your questions to me for help. chat （online）（在線）聊天 to chat is to talk about ordinary things that are not very important. you can chat to one person or to many people. people also use this word now for parts of the internet where we can talk with many different people at the same time. usually, you chat on the internet in a chat room or messaging service like aol(american on-line) instant messenger (aim), yahoo messenger, or msn messenger. 4. reading and transferring scan the text for information to complete the table below, describing the development of computer. in 1642 in 1822 in 1936 in 1960s in 1970s iv. closing down by doing comprehending exercises turn to page 18 and in pairs do the comprehending exercises no. 1 and 2. period 2: a sample lesson plan for learning about language (the present perfect passive voice) aims to learn to usethe present perfect passive voice to discover useful words and expression to discover useful structures procedures  i. warming up by reading to the tapeto begin with, turn to page 18, listening to and reading to the recording of the text who am i? attention goes to the pauses and intonation, as well as the pronunciation of the reader.