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Session 35: Conversion of Length

Session Title

Conversion of Length

Objective

By the end of this lesson, students will be able to:


  1. Identify different units of length (mm, cm, m, km).

  2. Convert between these units using practical and interactive activities.

  3. Apply length conversions in real-life situations.

Concept

Exploring the World of Length Conversions

Materials Required

Chalk,

Board,Chalk Ruler, Board  Ruler Scale, Measuring tapes,tapes Conversion table/ Chart

Methodology

Activity and SEL-based 

Session Duration

 90 Minutes

Introduction  Activity 


Measurement in Motion (20 minutes )


Make students into small groups:-


Ask students to estimate and then measure everyday classroom objects (e.g., a pen, desk, board, bench, floor).


They measure using different units (mm, cm, m) and compare results.


Discuss: Why do we need different units for measurement?


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Explain the units of length (10 minutes)


Use hand movements (e.g., small steps for mm, bigger steps for meters) to make it kinesthetic.


Main Activity

Main Topic/ Activity


“What’s the Best Unit?”-  Discussion ( 10 minutes)


Objective: Understand when to use different units in real life.


Present scenarios:


  • Measuring a road length (km or m?)


    Measuring a pen (cm or mm?)


    • Height of a tree (m or cm?)


      Tailor measuring Fabric ( cm or m )


      • Doctor measures the height of a child during the check up ( mm or cm)


        Measuring football field ( cm or m )


        • Measuring the thickness of a coin ( mm or cm )


          Laying tiles on the floor ( cm or m )



          Converting Method  (45 minutes)


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          Display the conversion table and explain relationships (e.g., multiplying/dividing by 10, 100, 1000).


          1. Convert 5 meters to centimeters.


          2. Convert 200 centimeters to meters.


          3. Convert 3 kilometers to meters.


          4. Convert 1,500 millimeters to meters.


          5. Convert 4.5 meters to millimeters.



          Expected Learning  Outcome:


          Knowledge building-

            Identify different units of Length

            Inquiry based discussion ( why do we convert? )


            Skill Building-

              Contextual understanding

              Critical thinking


              Review Questions/Assessment/Tasks 


              Follow up Tasks


              Home work: ( 5 minutes )


              1. The rope is 2.5 meters long. How many centimeters is it?

              2. A pencil is 140 mm long. Convert it to centimeters.

              Expected Learning  Outcome:

              Knowledge building-

                Identify different units of Length

                Inquiry based discussion ( why do we convert? )

                Skill Building-

                  Contextual understanding

                  Critical thinking


                   

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