Lesson Planning of Conversion of Units of Mass / Weight
Subject Mathematics
Grade 4^{th}
Students` Learning Outcomes
 Convert kilograms to grams and vice versa.
Information for Teachers
 Kilogram and gram are the units to measure “weight”. Kilo means thousand that is short for ‘kilogram’.
 1 kilogram = 1,000 gram.
 A paper clip weighs about 1 gram.
 Kilogram is written as ‘kg’ and grams as ‘g’.
 A loaf of bread weighs about 700 g.
 A gram is about a quarter of a teaspoon of sugar, cubic centimeter of water, pen cap or a pinch of salt.
 A kilogram is about 7 apples, two loaves of bread or the weight of 1 liter of water.
 To convert kilograms into grams we multiply, as; g = kg x 1,000
 To convert grams into kilograms we divide, as; kg = g ÷ 1000
 During this lesson the teacher should also consult with textbook at each level wherein and whenever it is required.
Material / Resources
Writing board, chalk/marker, duster, measuring tape, scale, and textbook
Introduction
 Tell them that today we will study about converting the kg into g.
 Ask from students what do they know about weight?
 Ask them that we measure the weight of whom, why and how?
 Ask from students do they know how much is their weight and they measure the weight with which unit?
 Tell them that our weight can be measure in kilograms.
 Ask them, “Have they even seen a balance?”
 Show them a bathroom scale and measure their weight on it.
Development
Activity 1

Activity 2

Activity 3

Sum up / Conclusion
 Finish the lecture by repeating some key points of the lecture.
 Kilograms and gram are the units to measure “weight”.
 Kilograms are used to measure heavy weight objects and grams to measure light weight objects.
 Kilo means thousand and 1 kilogram = 1,000 grams.
 Kilogram is generally written as kg and grams as g.
 To convert kilograms into grams we multiply.
 To convert grams into kilograms we divide.
 If the weight is given in both measure e.g. “kg and g” then first convert kilograms into grams and then add the grams in grams.
Assessment
 Assess the students by asking them to convert these weights into g: as;
 i) 2.6 kg = ________ g.
 ii) 5 kg, 9 g = ________ g.
 iii) 21 kg = ________g.
 iv) 8 kg, 260 g = ________ g.
Follow up
 Assign some questions related to the topic as homework.
 Ask the students to estimate the weight of following in kilograms and convert in grams also; as;
 i) Dinner set = ________ kg = __________ g.
 ii) Hen = ________________ kg = __________ g.
 iii) Pillow = __________ kg = __________ g.