Lesson Plan – Rectangles
Objectives and Habits of Mind
Level 3 - To understand the difference between area and perimeter.
Level 4 - To find the area and perimeter of a rectangle by counting squares.
Level 5 To use formula to find area and perimeter of rectangles and compound shapes.
Keywords: Area, Perimeter, Length, Width, Formula
Mental and Oral Starter
Pupils to complete the ‘heard the word’ grid.
Main Activity
Using mini white boards ascertain pupils prior knowledge and recap the methods used to calculate
the area and perimeter of rectangles and compound shapes. Give out the ‘today’s task’ instruction
sheet to each group and briefly talk through the instuctions with the class. Discuss the learning
outcomes and remind pupils to choose the rectangles or compound shapes that will challenge them.
Plenary
Pupils to reflect on the success criteria for the Habits of Mind and Maths Objectives
LO To find the area and perimeter of RAG
rectangles.
Key Words: Area, Perimeter, Length,
Width
13-Apr-15
Starter Activity
Complete the ‘Heard the
Word’ table and then fold it in
half and glue it into your book.
Level
3
4
5
6
7
8
Shape
Space
Measure
I understand
and can
explain the
difference
between
area and
perimeter.
I can find the
area and
perimeter of
shapes by
counting
squares.
I can find the
area of
rectangles and
squares using a
formula.
I can find the area of
triangles, kites,
parallelogram
trapeziums and circles.
I can use formulae for
the volume of cuboids.
I can find the volume
and surface area of
cuboids.
I can calculate
volumes and
surface area of
prisms and
cylinders.
I understand
the difference
between
formulae for
area,
perimeter and
volume by
considering
dimensions.
I am starting the lesson on level _____________________
By the end of this lesson I want to be able to _____________________
Key Words
Polygon
Length
Width
Height
Perimeter
Area
Surface Area
Volume
Circumference
Radius
Diameter
Pi
On your mini white boards describe what I mean by
the perimeter of this rectangle.
On your mini white boards describe what I mean by
the area of this rectangle.
How could we calculate the perimeter of the black
rectangle?
How could we calculate the area of the black
rectangle?
7
4
How could we calculate the perimeter of this
rectangle?
5cm
3cm
How could we calculate the area of this rectangle?
5cm
3cm
How do we calculate the perimeter of
any rectangle or square?
width
length
We add two lots of the length and two lots of
the width!
A = l + l + w + w
How do we calculate the area of any
rectangle or square?
width
length
We multiply the length by the width!
A = l x w
Find the area of this
shape:
2cm
2cm
5cm
5cm
Today’s Task
•Match the different shapes to their areas and perimeters.
•The groups does not need to match all of the shapes, it is more important
that each person works on a shape that challenges them.
•If necessary two people could work on the same shape and compare their
answers.
•For each shape you must show how you worked out the area and the
perimeter.
•You cannot glue a matching pair onto your A3 paper unless the rest of the
group agree with your method.
•If you complete both the shapes (these are the challenge shapes) draw a
*
challenge shape of your own and work out the area and the perimeter.
2cm
3cm
7cm
8cm
10cm
10cm
2cm
*
8cm
5cm
12cm
12cm
7cm
This path
is 2cm
wide all
the way
around.
3cm
17cm
7cm
7cm
*
44cm
51cm2
28cm
46cm2
18cm
12cm2
?
44cm2
10cm2
40cm
80cm2
14cm
20cm2
36cm
14cm2
49cm2
14cm
?
120cm2 18cm