Lesson Planning of Measurement of Length, Mass and Capacity (Addition of Units of Length)
Subject Mathematics
Grade 3^{rd}
Students` Learning Outcomes
 Add measures of length in same units with and without carrying.
 Solve real life problems involving same units of length for addition with and without carrying.
Information for Teachers
 Same units of measurement can be added, as;
 Centimetre can be added into centimetre
 Meter can be added into meter
 Kilometre can be added into kilometre.
 While teaching the lesson, the teacher should also consult text book at all steps wherein and whenever it is applicable.
Material / Resources
Writing board, chalk/marker, duster, stick, ruler, meter rode and measuring tape etc.
Introduction
 Describe a situation
 There are four baskets two of apples and two for oranges
 Ask from students how many oranges and how many apples.
 Point out that we can sum apples with apples and oranges with oranges only.
 Teacher can use copies and book alternatively.
Development
Teaching Approach
Inquiry, problem solving
Activity 1 (Problem solving)
10 cm + 15 cm = Centimetre 1 0 cm +1 5 cm 2 5 cm

Activity 2 Ask the students to add the following quantitative 40 cm + 10 cm 15 cm + 4 cm 35 cm + 12 cm 5 m + 62 m 123 km + 76 km 100 km + 85 km Guide the students in writing unit digit under unit digit and tens digit under tens digit and hundreds digit under hundred digit. Centimetre, Centimetre 4 0 cm 1 5 cm +1 0 cm + 4 5 0 cm 1 9 cm Meter, Meter 3 5 m 0 5 m + 1 2 m + 6 2 m 4 7 m 6 7 m Kilometre, Kilometre 1 2 3 km 1 0 0 km + 7 6 km + 8 5 km 1 9 9 km 1 8 5 km Ask the students to solve the following sums: 100 m + 100 m = 57 m + 15 m = 16 km + 69 km = 39 cm + 51 cm = 589 km + 306 km = 900 km + 100 km = 155 km + 715 km = 365 km + 26 km =

Activity 3 (Problem solving)

Nadia during her walk covers 425 km distance 1^{st} day. Next day she covers 350 km distance. What is total distance she covers in two days?
 Ask from students:
 Distance covered on 1^{st} day = 425 km
 Distance covered on 2^{nd} day = 350 km
 Total distance covered = 775 km
 Inform to students that we have learned today how to add two or more lengths together.
 Ask from students:
 Can we add m into cm and km into m?
 Bring them to the point that they know that same units cm be added together.
Assessment
 A boy has two pieces of string one with 47 m long and other 21m long. Find the total length of the string.
 Teacher is also required to involve the students in solving the problems given in the exercise at the end of unit / chapter.
Follow up
 Measure the heights of your family members and find the total height of them. Measure the lengths of all your books and find the total lengths of your entire book.