Unit3 Computers Period 2 Learning about Language 优秀教案（人教版必修 2）Period 2 Learning about LanguageThe General Idea of This Period：This period includes revision of the text、learning about language.From this period the students will learn how to use some of the key words and expressions in the text and do some exercises for consolidation，and learn how to use the Present Perfect Passive Voice.Teaching Aims：1.Help th e students to learn to use some useful words and expressions.2.Enable the students to learn how to use the present perfect passive voice.Teaching Important Point：The use of the pres ent perfect passive voice.Teaching Difficult Points：How to master the usages of some important words and phrases and the Present Perfect Passive Voice.Teaching Methods：1.Task-based learning.2.Cooperative learning.3.Explanation and practice.Teaching Aids：1.A tape recorder.2.A multimedia.Teaching Procedures：Step 1 RevisionT ： Boys and girls ， in last period we learned something about the history and development of computers.Now who would like to re tell the text with the help of these figures?S1 ： Let me try.In 1642 ， a calculating machine was used in France.Then in 1922 ， the Analytical Machine was made by Charles Babbage.It could follow instructions from cards with holes.In 1936 ， Alan Turing ， the real father of computers ， wrote a book to describe how computers could be made to work and built a “universal machine” to solve any mathematical problem.Later ， people discovered the computer had “artificial intelligence”.In the 1960s，the computer got his new transistors.Its size was totally changes at that time.And in the early 1960s ， the first family of computers were connected to each other.In...
