Lesson 50

　　language focus: beginning, at the beginning of, square, hardly

　　teaching objectives:

　　1. understand the text.

　　2. learn some useful words and phrases.

　　properties: recorder; overhead projector; pictures.

　　teaching procedures:

　　i. duty report.

　　ii. revision

　　get the students to revise some numbers first, then give them a dictation:  

　　iii. leading in

　　ask: do you have a watch? please look at your watch for one second. can you guess how many babies will be born?

　　maybe they can’t answer it. then tell them: in one second, there will be 4 babies come to our world.

　　ask another question: in most of your families, there is only one child in every one family. do you know why?

　　then say: today we're going to read about the world’s population. the world’s population is growing very fast. it