Selecting the most appropriate metric unit for measuring different objects and distances (e.g., a football pitch in metres, not centimetres).
Where your child meets this in real life: Deciding what measuring tool to use, understanding appropriate precision for different tasks
Each SEAG paper has 28 maths questions. Questions 29 to 50 are multiple choice with five possible answers, and questions 51 to 56 need a short written answer. With 56 questions in 60 minutes across English and maths, that is about a minute per question.
SEAGReady breaks choose appropriate units into 2 steps, taught in order so each skill builds on the last.
Select appropriate length units (cm, m, km) for measuring everyday objects and distances
Select appropriate units for measuring different attributes: length (cm, m, km), mass (g, kg), and capacity (ml, l)
Try three free questions from our choose appropriate units course. They start easy and get harder, so you can see where your child's confidence runs out. If they manage the last one without a hint, this topic is probably secure. If not, the steps above show where to start.
Ella wants to measure the length of her school hall for a maths project. Should she measure it in centimetres, metres, or kilometres?
A beach bucket holds 10 ___ of water. Which unit should be used: litres, grams, or metres?
The school-fair measurements are shown. Which row gives all three missing units correctly?
This is the exact interactive worked example your child sees in SEAGReady. Step through it and watch the method build up.
Josh wants to measure the length of the school football pitch for a PE project.
Should he measure it in centimetres, metres, or kilometres?
Pitch length: cm, m, or km?
A centimetre is about the width of your fingernail
Step 1 of 5
Josh wants to measure the length of the school football pitch for a PE project.
Should he measure it in centimetres, metres, or kilometres?
Josh should measure the pitch in metres. It would be about 100 metres long.
The key insight: Choose a unit that gives you a sensible number - not too big, not too small!
Common mix-up: Measure the pitch in centimetres (10,000 cm). 10,000 is hard to picture. Using metres (100 m) is much easier to understand and work with.
These are the misconceptions we see most often in choose appropriate units, including the ones our practice questions are specifically designed to catch.
Struggling with choose appropriate units? The real gap is often in one of these earlier topics.
Sitting the SEAG test this November? Read our last-month revision plan, Paper 1 vs Paper 2 and test day guide.
SEAGReady finds the exact step where your child gets stuck, teaches it with worked examples like the one above, and brings it back for review so it sticks.
Free to start · no card needed