Year 1 - Maths
Count a set of objects
Comparing quantities - part part whole relationships
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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 explain that items can be compared using length and height, mass and volume/capacity. They will compare sets of objects using equality/inequality symbols. Pupils will also explore part-part-whole relationships with representations.
Lesson Summary
You will learn to count set of objects accurately.
Key Notes
- Point to concrete and pictorial resources when counting to 10 to make links and identify how many in a set.
- The order in which we count the items in a set is unimportant.
- The number of objects in a group is the same whether they are spread far apart or are close together (conservation).
Vocabulary To Learn
- count: saying the numbers in order to find the total amount in a set
- altogether: the total amount in a set
- the same: exactly the same amount or value
Common Mistakes To Avoid
- When objects are moved or rearranged, children may re-count them to find 'how many'.
3 Quick Questions (With Answers)
1. Solve this in steps: explain the method from this lesson and why each step matters.
Point to concrete and pictorial resources when counting to 10 to make links and identify how many in a set. The order in which we count the items in a set is unimportant.
2. Use this key word in a maths sentence and explain it clearly. 'count'
saying the numbers in order to find the total amount in a set. Use this word when showing your method, then check your final answer is reasonable.
3. Spot and fix this common maths mistake.
Mistake: When objects are moved or rearranged, children may re-count them to find 'how many'. Correction: Setting this lesson up practically will help reinforce that there is no need to re-count the set of objects - show they have just moved.
More Lessons In This Unit
- Explain that a whole can be split into parts Study Guide
- Explain that a whole can represent a group of objects Study Guide
- Explain that items can be compared using capacity Study Guide
- Explain that items can be compared using length and height Study Guide
- Explain that items can be compared using weight and mass Study Guide
- Explain what a part-part-whole model is Study Guide
- Explain what a whole is Study Guide
- Identify a part of a whole group Study Guide
- Solve problems by comparing sets of objects Study Guide
- Solve problems using part-part-whole models with more than two parts Study Guide
- Use a part-part-whole model to represent a whole partitioned into two parts Study Guide
- Use a part-part-whole model to represent partitioning into more than two parts Study Guide
- Use equality and inequality symbols to compare sets of objects Study Guide
- Use equality and inequality symbols to compare the relative size of two numbers Study Guide
Browse all guides in the Year 1 Maths guide library.