Measurement: perimeter, area (counting squares) and volume (intro) – Week 2 focus
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Subject: Mathematics
Class: Grade 3
Term: 3rd Term
Week: 2
Theme: General lesson support
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Introduction This week, we are diving into the exciting world of Measurement! We will be learning about three important ideas: perimeter, area, and volume. These might sound like big words, but they are things we see and use every day in our lives here in South Africa. Imagine you are helping your Gogo plant a vegetable garden to grow delicious morogo (spinach) and mielies. You would need to know the perimeter to figure out how much fence you need to buy to keep the goats out. The area would tell you how much space you have inside the fence for planting your seeds. Now, think about the big Jojo tank that collects rainwater. How much water it can hold is its volume.
This section explains the main ideas for this week. We will look at each one carefully with examples that you can understand.
Concept 1: Perimeter What is it? Perimeter is the total distance AROUND the outside of a flat (2D) shape. Think of it like walking along the edge of a soccer field, or putting a fence around a garden. You are measuring the total length of the border. How do we find it? For this week, we will find the perimeter by counting the length of the units along the outside edge of a shape drawn on a grid. Each side of a small square on the grid is 1 unit long.