School: ABC Secondary School

Teacher: Ng Wai Man

Date: 12/11/2019

Time: 1:00 – 1:45 pm

Class: Secondary Four

Subject: Mathematics

Topic: Graphs of Exponential Functions and Logarithmic Functions

Time

Content

Details

Remarks

2 mins

Recalling the

graph of exponential functions and

logarithmic

functions

The teacher will ask students to pair up the functions and their graph in page 1 of the worksheet.

(Revision)

(1) The teacher will use

projector to show the

graph on the whiteboard.

(2) Students will be asked to

write down the

corresponding functions

next to the graph.

2 mins

Telling the goal of

the lesson

The teacher will draw three types of graph on the board:

1.Four exponential functions,

2.Four logarithmic functions,

and

3. An exponential function and a

logarithmic function:

(a) a > 1,

(b) 0 < a < 1.

Then teacher will tell student the goad of the lesson is to compare those graphs.

(Motivation)

(1) The teacher will ask

student how to compare those

graphs before going to the

next step.

8 min

Comparing the graphs of exponential functions (y = ax) in different value a

4 Students will be formed as a group and asked to follow the steps and answer the questions in page 2. The goal of students in this part is:

A group of the student will share their conclusion to classmate and then teacher will point out the short summary in this page.

Materials:

1. iPad (with Geogebra) X 6

(1 iPad per a group)

(1) The group who need to present will use airplay to show their work (Geogebra) on the board and share their idea to classmate.

8 min

Doing exercise

Students will be asked to finish the exercise in page 3 of the worksheet.

(1)Teacher will ask two students to finish Ex.2 and Ex.3 on the board respectively.

(2)Teacher will show the question on the board.

8 min

Compare the

graphs of

logarithmic

functions (y = logax)

(1)The group who need to present will use airplay to show their work (Geogebra) on the board and share their idea to classmate.

7 min

Doing exercise

Students will be asked to finish the exercise in page 5 of the worksheet.

(1) Teacher will ask two students to finish Ex.4 and Ex.5 on the board respectively.

(2)Teacher will show the question on the board.

8 min

Finding out the

relationship

between the

graphs of

exponential

functions and

logarithmic

functions

4 Students will be formed as a group and asked to follow the steps and answer the questions in page 4. The goal of students in this part is to find out the relationship between the graph of y = ax and y = logax. A group of the student will share their conclusion to classmate and then teacher will point out the short summary in this page.

(1)The group who need to present will use airplay to show their work (Geogebra) on the board and share their idea to classmate.

2 min

Conclusion

The teacher will conclude the following points:

At the end of lesson, students will

be asked to finish Ex.6 as

homework.