lesson 20 let’s write hometeaching content: 1. mastery words: letter, dear, dad, soon, bottom, address, stamp 2. a text about writing a letter 3. some useful expressionsteaching goals: 1. understand the meaning of the text 2. remember the mastery wordskey points: learn how to write a postcard learn how to write an envelopedifficult points: write a letterpreparations: postcards, letters, envelopesteaching aids: audiotape, postcards, envelopes, letterstype: textteaching procedure1. opening class1) greet the students in english and make sure they can response correctly.2) everyday report in english3) check the homework and explain something when necessary.2. key conceptsstep 1 presentationask the following questions: have you ever write a letter in chinese?do you know how to write a letter in english?where do you put the address? where do you put the stamp?today we will learn how to write an english letter.step 2 listen and thinklisten to the tape of a letter. then look through the text together with the students. show the students some letters and envelopes and let them know how to write a letter. learn the words: top, bottom, left and right. show a letter to the students when explaining.step 4 demonstrationuse objects in the classroom—such as the blackboard, a door or a window—to demonstrate top, left, right, bottom and corner. ask the volunteers to show you the top, left, right and corner of objects in the classroom.step 5 practice divide the class into small groups. ask each group to make up a dialogue about buying postcards. why are they buying postcards? who do they buy them for？what pictures do the postcards have？step 6 play a gameplay “opposites” with the new words and the words they know.step 7 deal with “l(fā)et’s do it”make a postcard. draw a picture on it including a place for writing a note, a place for the address and a place for the stamp. write to a classmate. do you know his or her address? ask！step 8 if time permits, do some exercises in the activity book.3. homework1) finish the remaining exercises in the activity book2) preview the next lesson in the student book