Module5 A Lesson in a Lab教案

exercise 2:
⑴the hot metal is getting bigger and bigger.
⑵the magnesium is getting hotter and hotter.
⑶the sun is getting stronger and stronger during the morning.
⑷the sea is becoming warmer and warmer.
homework:
1.  finish the exercises 2, 3 & 4 on page91-92 in their workbook.
2. preview the rest of this module.

period 5
listening and writing, everyday english & pronunciation
teaching aims:
1. to learn to catch the related information from what they hear and understand the meaning of some expressions by context.
2. to enable the ss to recognize the basic differences about the intonation of wh-questions and yes/no questions from what they hear.
3. to develop writing ability by practicing writing out the description of the scientific experiment according to what they hear.
 important and difficult points:
1. enable the ss to recognize the basic differences about the intonation of wh-questions and yes/no questions according to what they hear.
2. have the ss understand the exact meaning of some sentences by context.
teaching procedures:
listening and writing
it is necessary for a teacher to give the ss a brief indication before listening. for this listening, the teacher can say to the ss: we are going to listen to a dialogue that takes place in a lab. a teacher helps a student do an experiment. in this experiment, the metal magnesium burns in air. is there a change in weight when this metal burns in air? let’s guess / predict.
after the necessary indication, give the ss very clear directions and requirements to listen. the teacher can continue to say: now let’s listen to the dialogue. try to find out whether there is a change in weight when the metal magnesium burns in air. at the same time, pay attention to the information related to the following:
aim:____________________________________________________________
apparatus:_______________________________________________________
method:_________________________________________________________
result:__________________________________________________________
conclusion:______________________________________________________
then begin to play the tape once and ask answers from the whole class. and then ask the ss to finish activity 2 on page 47.
play the recording again and ask the ss to complete the above description on their own, and then to check their answers in pairs. before replaying the recording, of course, had better remind the ss how they usually write up science experiments, that is, completing the description involves some careful reading for specific information and reorganizing the information.