Lesson Plan of Units of Length
Subject Mathematics
Grade III
Students` Learning Outcomes
 Read standard units of length (kilometer, meter and centimeter) using abbreviations.
Information for Teachers
 The metric system of units was first introduced in the nineteenth century. It is essentially a simple system based on the decimal system. That is why; it allows easy conversion from one unit to another.
 The metric system of units involves measurements of length, area, mass, capacity and volume; all these units being related through the decimal, system.
 That is why; it allows easy conversion from one unit to another.
 The metric system of units involves measurements of length, area, mass, capacity and volume; all these units being related through the decimal system.
 The basic unit of length is meter.
 Small lengths are measured in centimeters, whereas the large lengths are measured in meters and kilometers.
 The letter “m” is used as an abbreviation of meters, “cm” for centimeters, and “km” for kilometers.
 Make the following charts and display in the classroom.
 Use these charts to explain the relation between units and subunits of length. Describe abbreviations of units.
 While teaching the lesson, also consult textbook where and when applicable.
Material / Resources
Writing board, chalk / marker, duster, worksheets, charts, ruler, meter ruler measuring tape
Introduction
 Show a small scale/ruler to the students and ask the following questions:

 Which unit is written on the scale? (point out “cm”)

 Tell them “cm” stands for centimeter.
 It is used to measure the length of small objects or the distance between two neighboring points. For example; the length of desk is measured in centimeters.
 Ask them to keep their finger on the scale and read aloud 1 cm, 2 cm, 3 cm, 4 cm……..etc.
 Ask one of the students, what is the length of this ruler? (15 cm).
 Now show them meter ruler and ask, “What is the length of meter ruler?” (100 cm)
 Tell them 100 cm = 1 m and meter ruler is normally used to measure distance between two pints/places within a small compound.
 For example, the distance between their school gate and the classroom is measured in meters.
Development
Activity 1
 Place the ruler, meter rod and measuring tape in front of students
 Now ask the following questions to students:

 Which instrument will we use to measure the length of small objects like pen, pencil, chalk or eraser? (Ruler)
 Which instrument is used to measure the height of a person? (measuring tape/meter rod)

 Now tell them kilometer is used to measure the distance between two places far away of each other. For example, the distance between Bahawalpur and Multan is measured in kilometers.
 “Km” stands for kilometers.
Activity 2
 Display a following chart on the board (To make this chart can use the picture of these things)
 Ask the following questions:

 Which units (cm, m and km) are to be used to measure the length of following?
 The height of horse.
 The length of a car.
 The length of an ant.
 The height of a candle.
 The distance between school and house.
 The length of a foot.
 The length of a bridge.
 Which units (cm, m and km) are to be used to measure the length of following?

 If students tell the wrong answer, describe and explain the units again.
Sum up / Conclusion
 Sum up the concept by telling them:


 Centimeters are used to measure the lengthy of small objects.
 Meters are used to measure the lengthy between two points with in a small compound.
 Kilometers are used to measure the distance between two places far away of each other.
 We write “cm” for centimeters, “m” for meters, “km” for kilometers.

Assessment
 Ask the following questions:

 Which unit of length will be used to measure the length of pencil?
 Which unit of length will be used top measure the length of playground?
 Which unit of length will be used to me4asure the distance between Bahawalpur to Multan?

Follow up
 Ask the students to collect the following information.
 Distance between Bahawalpur to Capital of Pakistan.
 Distance between Bahawalpur to Karachi.
 Measurement of your height.
 Ask the students to solve the questions given in their textbook.
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