Myths about teaching can hold you back
- Year 6
Reason about compound shapes using the relationship between side lengths and area and perimeter
I can reason about compound shapes using the relationship between side lengths and area and perimeter.
- Year 6
Reason about compound shapes using the relationship between side lengths and area and perimeter
I can reason about compound shapes using the relationship between side lengths and area and perimeter.
Lesson details
Key learning points
- Area and perimeter are calculated from the side lengths of 2D shapes.
- Area and perimeter are measured in different units.
- Compound shapes can be decomposed and rearranged in different ways.
Keywords
Compound - A compound shape is a shape created using two or more basic shapes.
Dimension - A dimension is a measurement of length in one direction.
Common misconception
The numbers used as side lengths in this lesson are generally relatively low, and based around times tables. As a result, pupils might be tempted to guess / estimate the missing side lengths.
Remind pupils that the shapes are not to scale and encourage them to use subtraction skills instead - what is the difference between this known side length and this known side length?
To help you plan your year 6 maths lesson on: Reason about compound shapes using the relationship between side lengths and area and perimeter, download all teaching resources for free and adapt to suit your pupils' needs...
To help you plan your year 6 maths lesson on: Reason about compound shapes using the relationship between side lengths and area and perimeter, download all teaching resources for free and adapt to suit your pupils' needs.
The starter quiz will activate and check your pupils' prior knowledge, with versions available both with and without answers in PDF format.
We use learning cycles to break down learning into key concepts or ideas linked to the learning outcome. Each learning cycle features explanations with checks for understanding and practice tasks with feedback. All of this is found in our slide decks, ready for you to download and edit. The practice tasks are also available as printable worksheets and some lessons have additional materials with extra material you might need for teaching the lesson.
The assessment exit quiz will test your pupils' understanding of the key learning points.
Our video is a tool for planning, showing how other teachers might teach the lesson, offering helpful tips, modelled explanations and inspiration for your own delivery in the classroom. Plus, you can set it as homework or revision for pupils and keep their learning on track by sharing an online pupil version of this lesson.
Explore more key stage 2 maths lessons from the Draw, compose and decompose shapes unit, dive into the full primary maths curriculum, or learn more about lesson planning.
Licence
Prior knowledge starter quiz
6 Questions
Q1.Select all of the statements that are true of this number shape.

Q2.Laura says the perimeter of this shape is 8 units. What mistakes do you think she has made?

Q3.What is the perimeter of this rectangle? cm

Q4.What is the perimeter of this shape? Remember to include the correct units.

Q5.What is the missing side length of this rectangle? Remember to include the correct units.

Q6.What is the area of this square? cm$$ ^2 $$

Assessment exit quiz
6 Questions
Q1.Give the missing side length. cm

Q2.Give the missing side length. cm

Q3.Is there enough information to calculate the perimeter of the shape?

Q4.Calculate the perimeter of the shape. cm

Q5.The area of the shape is 43 cm². Order the steps to work out the missing dimension.

Q6.The area of the shape is 43 cm². What is the missing side length?
