Understand approximate equivalence between metric and imperial units
Lesson details
Learning outcome
I can understand approximate equivalence between metric and imperial units.
Key learning points
- 1 inch is approximately equal to 2.5cm.
- 1 pound (lb) is approximately 0.5kg.
- 1 pint is just greater than 0.4l.
Keywords
Metric - Metric is a system of measuring based mainly around the decimal system.
Imperial - Imperial is a system of measuring which originated in England which has been replaced by the metric system in most countries.
Common misconception
Two unrelated units of measure are called 'pounds' - the money version and the mass version. Pupils may confuse one for the other.
In this lesson, the word pounds (as in mass) is used with the abbreviation lb in brackets. It is recommended that you use both of these until pupils reach a point where they can automatically read lb as pounds and and record it as such.
Teacher tip
Task 1 in the first cycle asks pupils to complete a table, adding in examples of imperial and metric units. It is recommended that they first do this as a group using a large sheet of sugar paper and sticky notes, to promote discussion.
Licence
Lesson video
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Prior knowledge starter quiz
6 Questions
Q1.Match the unit of measure with the correct type of measure.
length
mass
capacity
Q2.Match the unit of measure with the correct type of measure.
length
mass
capacity
Q3.Match the unit of measure to the correct abbreviation.
mm
m
l
kg
Q4.Which of these numbers will you say if you are counting in steps of 12? Select all that apply.
Q5.36 + 36 =
Q6.Round 91.4 cm to the nearest metre. m
Assessment exit quiz
6 Questions
Q1.Select all of the imperial units of measure.
Q2.Select all of the metric units of measure.
Q3.Match the symbols to their correct meaning
equal to
less than
greater than
Q4.Join the imperial unit of measurement to the context that makes the most sense.
water
road
cooking flour
string
Q5.1 ounce is approximately equal to 28 g. Convert 10 ounces to grams. 10 ounces is approximately g
Q6.1 foot is approximately equal to 30 cm. Convert 5 feet to centimetres. 5 feet is approximately cm
To help you plan your 5 maths lesson on: Understand approximate equivalence between metric and imperial units, download all teaching resources for free and adapt to suit your pupils' needs...
To help you plan your 5 maths lesson on: Understand approximate equivalence between metric and imperial units, 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 Converting units unit, dive into the full primary maths curriculum, or learn more about lesson planning.