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.
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- 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?
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- 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.
