Lesson Plan of Units of Mass/ Weight
Subject Mathematics
Grade III
Students` Learning Outcomes
 Read standard units of mass/weight (Kilogram and gram) using abbreviations.
Information for Teachers
 The basic unit of mass is kilogram.
 Kilogram is used for heavy weight.
 Gram is used for light weight.
 The letters “kg” is used as an abbreviation for kilogram and “g” for gram.
 “Kilo” means one thousand. 1kg =1000g.
 Make the following charts and display in the classroom.
Material / Resources
Writing board, chalk/marker, duster, tooth paste; bath soap; medicine bottle; jam jar; sack of rice; packs of ghee; sack of flour; tea box all packs are empty; 1kg weight; 500g weight
Introduction
 Show 1kg weight to students. Look at this (14kg) weight.
 Have you ever seen it before?(at vegetable shop)
 What unit is written on this weight? (1kg)
 Tell them “kg” is the abbreviation of kilogram. This unit is used to measure the mass./weight of heavier thing e.g. flour, rice, potatoes, fruit etc. are weighted in kg.
 “g” is the abbreviation of gram. This unit is used to measure the lighter mass/weight.
 The ornaments of gold and silver ware weighted in g.
 Medicines are also weighted in g.
 One gram is much, much lighter weight than 1kg.
Development
Activity 1
 Show some objects on which mass is mentioned in g or kg.
 Tooth paste; bath soap; medicine bottle; jam jar; packs of ghee; sack of flour; tea box.
 Call the students one by one, ask them to pick anything from table.
 Ask from students what is the weight mentioned on these objects.
 What is the weight mentioned on tooth paste? (50g)
 What is the weight mentioned on bath soap?(small pack 80g)
 What is the weight written on medicine bottle?
 Weight mentioned on jam jar .(250g)
 Weight written on tea box. (500g)
 Now show them different pack of ghee.
 Tell them that;
 Show the empty sack of flour to the students and ask them. “How much “kg” flour was in this sack?” (20kg)
Activity 2
 Ask the students one by one to indicate one of the items in the classroom whose mass can be measured in grams.
 Make a list on the board under the column heading “items whose weight can be measured in g”
 Then ask the students one by one to indicate the one item ijn the classroom whose mass can be measured in kilograms.
 Make a list on the board under the heading
“items whose weight can be measured in kg”
Sum up / Conclusion
 Sum up the concept by telling:

 The basic unit of mass is kilogram.
 We measure the heavy object in kilogram and the light object in grams.
 We write “kg” for kilograms and “g” for grams.

Assessment
 Ask the following questions to the students.

 Which unit of mass/weight which unit of mass/weight is used to the measure the weight of earrings of gold?
 Which unit of mass/weight is used to measure the weight of boy?
 What is the abbreviation for gram?
 What is abbreviation for kilogram?
 How many grams are in 1 kilogram?
 How many grams are in half kilogram?
 How many grams are in quarter kilogram?

 Visit a grocer`s shop, read and write the weight of at least five things in different packing in notebook.
 Ask the students to solve the questions given in the textbook.
Follow up
 Visit a grocer`s shop, read and write the weight of at least five things in different packing in notebook.
 Ask the students to solve the questions given in the textbook.
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