Year 1 - Maths
Estimate and measure length and record results in a table
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 estimate length, use a ruler to check your estimate and record these results in a table.
Key Notes
- When you estimate length, you think carefully and make a sensible guess.
- When you find a measurement, you use a ruler so it is more accurate.
- Estimates and measurements can be recorded in a table.
- Information in a table can be used to describe and compare lengths.
Vocabulary To Learn
- Estimate: To find a value that is close enough to the right answer, usually with some thought or calculation involved.
- Measure: To find a number that shows the size or amount of something.
- Table: Information arranged in rows and columns.
Common Mistakes To Avoid
- Children may try to estimate length without aligning their object with the start of the known length (such as a 10 cm strip of paper).
3 Quick Questions (With Answers)
1. Solve this in steps: explain the method from this lesson and why each step matters.
When you estimate length, you think carefully and make a sensible guess. When you find a measurement, you use a ruler so it is more accurate.
2. Use this key word in a maths sentence and explain it clearly. 'Estimate'
To find a value that is close enough to the right answer, usually with some thought or calculation involved. 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 try to estimate length without aligning their object with the start of the known length (such as a 10 cm strip of paper). Correction: Each time you make an estimate, model aligning the object you are measuring with the start of the strip of paper. Make links to when we measure with a ruler, knowing we always have to line up the object we are measuring with 0 cm.
More Lessons In This Unit
- Comparing lengths Study Guide
- Estimate length in cm Study Guide
- Measure items using centimetre cubes and record results in a table Study Guide
- Measure length using a ruler 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
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