The key measuring skills that children need to master are:
- Choosing the correct units.
- Reading the scale accurately.
We can measure how long, wide or tall something is; or how far apart two things are.
In the metric system the smallest unit of measurement we use is millimetres.
One millimetre is about the thickness of a credit card – or your school canteen card.
Usually we use millimetres to measure small things. However in the building trade millimetres are often used to measure bigger things like rooms as it means you can be much more precise.
When you have 10 millimetres you then have a centimetre.
A centimetre is about the width of a letter key on a keyboard.
When you have 100 centimetres you have 1 metre. We use metres to measure bigger things.
A square metre is a square that is 1 metre on each side.
We write this as 1 m2.
In science and food technology, you need to measure volume regularly. The smallest unit we use is the millilitre – or ml.
- 1tsp = 1 teaspoon = 5ml
- 1tbsp = 1 tablespoon = 15ml
Larger volumes should be measured in a measuring cup or jug.
Bigger volumes still are measured in litres. 1 litre = 1000 millilitres.