Measuring time: Instruments for measuring time

Subject :

Basic Science And Technology

Topic :

Measuring time Measuring time

Instruments for measuring time

Class :

Primary 4

Term :

First Term

Week :

Week 11

Instructional Materials :

  • wall clock
  • wrist watch
  • time measure table


Reference Materials

  • Scheme of Work
  • Online Information
  • Textbooks
  • Workbooks
  • 9 Year Basic Education Curriculum

Previous Knowledge :

The pupils have previous knowledge of solid measure



Behavioural Objectives :  At the end of the lesson, the pupils should be able to

  • Define time
  • mention devices that are used to measure time
  • say the time correctly
  • convert from one unit of time measure to another unit of time measure



Content :

Time is the period or duration of an event. it is used to say how long an event is . The basic unit of measuring time is Second .Other units of time measure is as follow


The Time Measure Table

  • 60 seconds make one minute
  • 60 minutes make one hour
  • 24 Hours make one day
  • 7 days make one week
  • 4 weeks make one month
  • 12 months make one year
  • 365 days make one year
  • 366 days make one leap year



Thirty days has September

April , June and November,

All the rest are 31 except February alone ,

Which has 28 day and 29 days in each leap year


Time Measure Instruments

  • Quick sand
  • sun shadow
  • sunlight (sundial)
  • weather observation
  • stop watch
  • wrist watch
  • wall clock
  • digital clock
  • major seasons


Convert From One Unit Of Time Measure To Another Unit 

  1. Convert 2 minutes to seconds  solution ( 2 x 60 sec ) = 120 seconds
  2. Change 5 hours to minutes       solution ( 5 x 60 min ) = 300 minutes
  3. How many hours make 1 day    solution  (1 x 24 hours ) = 24 hours



The topic is presented step by step


Step 1:

The class teacher revises the previous topics


Step 2.

He introduces the new topic


Step 3:

The class teacher allows the pupils to give their own examples and he corrects them when the needs arise


Evaluation :

  1. Mention four time measure instruments

  2. What is the basic unit of measuring time

  3. When the long hand is on twelve and the short hand is on five , what time is it ?

  4. How many minutes make one hour

  5. Convert 4 days to hours

Conclusion :


The class teacher wraps up or conclude the lesson by giving out short note to summarize the topic that he or she has just taught.

The class teacher also goes round to make sure that the notes are well copied or well written by the pupils.

He or she does the necessary corrections when and where  the needs arise.


Assignment :

Prepare for the next lesson by reading your books for Revision



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