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)
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- 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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