Study Guides

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 solve problems by using a ruler accurately to measure lengths in centimetres.

Key Notes

• When using a ruler always measure starting from zero cm.
• Measuring length can help you find out if something will fit inside a container or not.
• You can tell 'first, then, now' stories that involve length.

Vocabulary To Learn

• Longer than: An object has more length than another.
• Shorter than: An object has less length than another.
• First: The 'first' part of a 'first, then, now' story represents an amount that was already there.
• Then: The 'then' part of a 'first, then, now' story represents an amount that was added or subtracted.
• Now: The 'now' part of a 'first, then, now' story represents the amount that there is at the end of the story.

Common Mistakes To Avoid

• Children may find it difficult to identify the 'then' part of the story because it is not found by measuring the length of the object.

3 Quick Questions (With Answers)

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 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