Year 1 - Maths
Measure length using a ruler
Numbers 0 to 20 in different contexts
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This pupil-friendly study guide includes a unit summary, clear notes, common mistakes, and quick questions with answers.
Unit Summary
In this unit pupils will consolidate their counting to 20. They will measure objects using non-standard and standard measures and record outcomes, providing a context for counting and comparing numbers to 20.
Lesson Summary
You will learn to use a ruler to measure length.
Key Notes
- Using a ruler means that you all get the same measurement for the same object.
- When using a ruler always measure starting from zero cm.
- Each number on the ruler represents one cm.
- cm is the short form of centimetres.
- The number on the ruler where the object ends tells you the length of the object.
Vocabulary To Learn
- Ruler: A tool for measuring length.
- Centimetre: A measure of length (about the width of a fingernail).
- Cm: A shorter way of writing centimetre.
- Zero: A number that shows that there is no amount.
Common Mistakes To Avoid
- Children may align the end of their object with the end of the ruler, rather than zero.
3 Quick Questions (With Answers)
1. Solve this in steps: explain the method from this lesson and why each step matters.
Using a ruler means that you all get the same measurement for the same object. When using a ruler always measure starting from zero cm.
2. Use this key word in a maths sentence and explain it clearly. 'Ruler'
A tool for measuring length. Use this word when showing your method, then check your final answer is reasonable.
3. Spot and fix this common maths mistake.
Mistake: Children may align the end of their object with the end of the ruler, rather than zero. Correction: Use a sticker or coloured pen to highlight the zero on the ruler so that children's attention is drawn to the zero when they are measuring length using a ruler.
More Lessons In This Unit
- Comparing lengths Study Guide
- Estimate and measure length and record results in a table Study Guide
- Estimate length in cm Study Guide
- Measure items using centimetre cubes and record results in a table Study Guide
- Measure length using centimetre cubes Study Guide
- Measure length using objects Study Guide
- Measure length using objects and record results in a table Study Guide
- Solve addition and subtraction problems involving length Study Guide
- Solve problems by measuring different lengths in cm using a ruler Study Guide
Browse all guides in the Year 1 Maths guide library.