Date:  

Class: 2nd grade  

Unit: 6

Lesson: 2  

OBJECTIVES:

1st.Preview the reading.

2nd.Practise silent reading.

3rd.Introduce new voc and check comprehension of the reading.

TEACHING AIDS:

Some cards.

ACTIVITIES:

A. (10m)

·       Open PB/P40-41. S read aloud the title P/40, ask: What is the problem with the ozone layer? .. a hole in the ozone......or.......There is a decrease in ozone in the earth’s atmosphere.

·       Ask: What is the cause of this hole? What is the cause of this decrease? fringes, air-conditioners, plastic foam and aerosol sprays.

·       How many paragraphs are there in the passage on page 41? 5

·       S read aloud the 1st sentence of para #1, ask: What do you thing this para about? the earth’s atmosphere, or the layers in the earth’s atmosphere.

·       Do the previous step with the other 5 para, e.g.,.:

Þ   para 2: a decrease in ozone in the stratosphere.

Þ   para 3: dangers of this decrease.

Þ   para 4: one cause of this decrease.

Þ   para 5: the answer to the problem of this decrease.

·       Write these 3 Q’s on the board:

  1.  Why is the ozone layer important? L:7-12, Because it protect the earth’s surface from ultraviolet rays.

  2.  What are CFCs used for? L:43-47, For cooling in fringes and air-conditioners, for making plastic foam, and in aerosol sprays.

  3.  Has anyone tried to solve the problem? L:45-56, Yes. A group of countries agreed to produce fewer CFCs.

·       S read aloud the Q’s,  S open PB/41, (4m) to find the answers and the lines.

·       I’ll read the passage but S ‘ll complete reading the sentences, S underline words they don’t know. I’ll introduce these words, the others ‘ll be in the Word Study:

·       I’ll show them the words, S read them in the passage, try to find their meanings by using similarity

One)deadly: (adj.) like dead and die means they can kill people.

Two)populated: similar to people and population.... are areas where there are people.

Three)increase (v):( X decrease) = more

Four)chlorofluorocarbbons: a group of man-made chemicals.

 (CI) chlorine                    (F) fluorine                    (C) carbon             + hydrogen

  e) CFCs / see-eff-sees/: as the same as the previous word (an appreviation), the last” s “is for the plural.

  f) agreement: like agree, (n) from agree, -ment means that this word is  (n).

·       Ask: Where can we find the ozone layer? L:4-6, in the atmosphere

     What is happening to the ozone layer above populated regions of the earth? L:26-28. it become lees.

     What are the ultraviolet rays thought to case? L:32-33, eye disease

     What is the answer to the problem of the decreasing ozone layer? L:51-53, to produce fewer CFCs

WRITTEN WORK:

Nothing.