Lesson Notes By Weeks and Term v4 - Basic 3

Lesson Video

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Performance objectives

• Identify and describe basic shapes
• Measure the perimeter of simple shapes
• Calculate the area of rectangles and squares
• Understand and identify symmetry

Lesson summary

B3 Grade 3 Mathematics Lesson Note: Geometry and Measurement Overview and Learning Objectives Hello Class 3! Today, we are going on an exciting journey into the world of shapes and measurement! We'll learn how to describe different shapes and find out how long things are using simple measurements. This is important because shapes are everywhere - from the football you play with to the houses we live in. Measurement helps us know how much of something we need, like when your mother is cooking waakye and needs to know how much rice to use.

Lesson notes

Shapes (2D):

A 2D shape is a flat shape that has length and width but no thickness. Think of a drawing on a piece of paper – that’s a 2D shape! Let's look at some common ones: Square: A square has four straight sides that are all the same length. It also has four corners, called vertices (one is a vertex). All the angles at the corners are the same and are called right angles. Think of a checkerboard or the shape of your exercise book if it is a perfect square. Rectangle: A rectangle also has four straight sides and four vertices. However, only the opposite sides are the same length. The angles at the corners are right angles too. Think of your classroom door or a Ghana cedi note. Triangle: A triangle has three straight sides and three vertices. There are different kinds of triangles, but we'll learn about those later. Think of the roof of a simple house or a slice of watermelon. Circle: A circle is a round shape with no straight sides and no vertices. Think of a football or a plate.

Measurement (Length):

Length is how long something is. We can use different tools to measure length, but today, we'll use a ruler. A ruler has markings on it, usually in centimeters (cm).