# Time – Telling Time in Seconds, Minutes and Hours (Primary 6)

MATHEMATICS

SECOND TERM

WEEK 9

PRIMARY 6

THEME – MEASUREMENT

PREVIOUS LESSON – Second Term Scheme of Work and Plan Lesson Notes for MATHEMATICS Week 1 to Week 12 Primary Schools

TOPIC – TIME

PERFORMANCE OBJECTIVES

By the end of the lesson, the pupils should have attained the following objectives (cognitive, affective and psychomotor) and should be able to –

1. tell time in seconds and minutes.

2. solve quantitative aptitude problem on time.

3. read timetable of journeys especially by trains and aeroplanes.

4. use time to plan daily activities.

ENTRY BEHAVIOUR

Telling time

INSTRUCTIONAL MATERIALS

The teacher will teach the lesson with the aid of:

1. Second pendulum, stopwatch and clock.

2. School timetable or calendar, list schedule of flights.

METHOD OF TEACHING – Choose a suitable and appropriate methods for the lessons.

Note – Irrespective of choosing methods of teaching, always introduce an activities that will arouse pupil’s interest or lead them to the lessons.

REFERENCE MATERIALS

1. Scheme of Work

2. 9 – Years Basic Education Curriculum

3. Course Book

4. All Relevant Material

5. Online Information

CONTENT OF THE LESSON

LESSON ONE – INTRODUCTION TO TIME

Pupil’s Activities 1 – 60 Seconds Make 1 Minute Song

Pupils Singing

60 seconds make 1 minute

60 minutes make 1 hours

24 hours make 1 day

7 days make 1 week

52 weeks make 1 year

365 days make 1 year

366 days make 1 leap year

Teacher’s Questions

What are the days of the week?

What can we do in 1 week?

What are the months of the year?

Expected Pupil’s Response

Days of the week – Monday, Tuesday, Wednesday, Thursday, Friday, Saturday and Sunday.

We go to school on Monday, Tuesday, Wednesday, Thursday, Friday. The weekend comes on Saturday, we wash our school uniform and play with family and friends and Sunday, we go to church.

Months of the year – January, February, March, April, May, June, July, August, September, October, November and December.

Pupil’s Activities 2 – School’s Time

Question

What time is assembly, short and long break, junior and senior closing time?

Expected Pupil’s Response

Assembly – 7.45 am

Short break –

Long break – 11.45 am

Junior closing time – 1.00 pm

Senior closing time – 2.00 pm

Pupil’s Activities 3 – Second, Minute and Hour Hands

Identify different hands of Wall clock.

There are three (3) hands, second, minutes and hour.

The red hand long is second hand.

The long bland hand is minutes.

The short black hand is hour hand.

Teacher’s remark – The uses of the three hands are stated in the song.

Pupil’s Activities 4 – Relationships between Second, Minute and Hour

If 60 seconds make 1 minutes

60 minutes make 1 hours

3 600 seconds = 1 hours

Copy and complete

1. 2 minutes = _____ seconds

2. 3 hours = _____ minutes.

3. 3 hours = _____ seconds.

4. 600 seconds = _____ minutes.

5. 600 seconds = _____ hours.

Hint – when changing seconds to minutes, divide by 60. Changing minutes to seconds, multiply by 60. Minutes to hour, divide by 60 while hour to minutes, multiply 60.

Pupil’s Activities 5 – Class Exercises/Take Home

If 24 hours make one day, how hours are there in

1. 2 days

2. A week

How many weeks are in

3. A month

4. 6 months

How many months are in

5.1½ years

6. 5 years

LESSON TWO – READING TIME 12 AND 24 HOURS CLOCK

Pupil’s Activities 1 – Time in 12 Hours Clock – 12 am and pm

Write the times shown on these clocks.

Expected Pupil’s Response

1. 2.00

2. 4.30

3. 9.00

4.11.15

Teacher’s remark – AM stands for Ante Meridiem, meaning “Before Midday” or “Before Noon”. An example: 10.00 a.m. is 10 o-clock in the morning. With a 24 hour time this is 10:00. PM stands for Post Meridiem, meaning “After Midday” or “After Noon”.

Pupil’s Activities 2 – Using AM and PM

If 1 – 4 is in the morning and 5 – 8 is in the afternoon, tell the time using am or pm.

1. 1. 2.00 am

2. 4.30 am

3. 9.00 am

4.11.15 am

5. 9.45 pm, etc.

Teacher’s/Pupil’s Activities 3 – 24 Hours Clock

Teacher’s comments – When 24-hour clock times are written with four figures, the first two figures represent hours and the last two figures represent minutes past the hour.

For examples,

1. 2.00 am is written as 02.00

2. 2.00 pm is written as 14.00

3. 5.22 am is written as 05.22

4. 5.22 pm is written as 17.22

5. 21.00 is written as 9.00 pm

6. 17.21 is written as 5.00 pm

Pupil’s Activities 4 – Class Exercises/Take Home

Write each time as a 24-hour time.

1. 3.25 p.m

2. 10.24 a.m

3. 11.13 p.m

Write each time as a 12-hour time. Use a.m or p.m.

4. 18.00

5. 19.50

6. 10.10

LESSON THREE – ADDITION AND SUBTRACTION INVOLVING TIME

Teacher’s/Pupil’s Activities 1 – Addition and Subtraction

Working Examples

07 h 35 m

11 h 32 m (+)

__________

18 h 67 m

Note – 60 minutes = 1 hour.

Therefore,

18 h 67 m = 18 h 60 m + 7 m

18 h + 1 h + 07 m

19 h 07 m

2. Subtract 13 h 13 m from 15 h 11 m

15 h 11 m

(14 h 71 m) 1 take from 15 h is 1 hour (60 m) added to 11 m

13 h 13 m (—)

__________

01 h 58 m

Pupil’s Activities 2 – Class Exercises/Take Home

Find the sum of:

1. 09 h 26 m + 12 h 56 m

2. 21 h 51 m + 02 h 52 m

Find the difference between:

3. 12 h 13 m and 10 h 15 m

4. 13 h 51 m and 09 h 19 m

LESSON FOUR – MULTIPLICATION AND DIVISION INVOLVING TIME

Teacher’s/Pupil’s Activities 1 – Working Examples

05 h 12 m x 5

05 h 12 m

x        5

________

05 h 60 m (60 m = 1 h)

06 h 00 m

12 h 24 m ÷ 4

3 h 6 m

__________

4√(12 h 24 m)

(—) 12 h 24 m

___________

00  00

Pupil’s Activities 2 – Class Exercise/Take Home

1. ¾ of 4 h 12 m

2. 5 h 23 x 6

3. 10 h 45 m x 3

4. 23 h 23 m ÷ 23

LESSON FIVE – READING TIMETABLES OF JOURNEYS (FLIGHTS AND TRAINS)

Reference lessons – New Method Mathematics Book 6

Page 163 – 165

PRESENTATION

To deliver the lesson, the teacher adopts the following steps:

1. To introduce the lesson, the teacher revises the previous lesson. Based on this, he/she asks the pupils some questions;

2. Guides pupils to perform practical activities to determine time on task e.g walking, eating, etc.

Pupil’s Activities – Measure time on task in seconds and minutes.

2. Guides pupils to solve quantitative aptitude problems on time.

Pupil’s Activities – Solve quantitative aptitude problems involving timing.

3. Guides pupils to use these time table to estimate the time it takes a train or an aeroplane to get to a specific destination.

Pupil’s Activities – Use timetable to estimate the time it will take a train and aeroplane to get to a designated destination.

4. Guides pupils to prepare timetable for their daily or weekly activities.

Pupil’s Activities – Use timetable to plan for a day or a week.

CONCLUSION

To conclude the lesson for the week, the teacher revises the entire lesson and links it to the following week’s lesson.

LESSON EVALUATION

Pupils to:

2. solve quantitative aptitude problems involving timing.

3. plan for a week or two weeks.

4. obtain timetable of train and estimate the time it will take the train to get to a specific destination.