New
New
Year 1

# Comparing lengths

I can use the language of comparing numbers to compare different lengths.

New
New
Year 1

# Comparing lengths

I can use the language of comparing numbers to compare different lengths.

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## Lesson details

### Key learning points

1. Lengths can be compared using longer, taller and shorter.
2. A length can be the longest tallest or the shortest of a set of measurements.
3. Height is a type of length.
4. Lengths can be equal to one another.
5. Objects can be ordered by height and length.

### Common misconception

When comparing objects, children may think that one is longer or taller because they have not aligned them to start at the same point.

Encourage children to place objects on a flat surface such as a table when comparing height, or against a wall when comparing length to make sure that they have the same start point.

### Keywords

• Length - How long from end to end.

• Height - How tall from bottom to top.

• Longest - The object in a set that is longer than all the others.

• Shortest - The object in a set that is shorter than all the others.

• Tallest - The object in a set that is taller than all the others.

Find opportunities throughout the day to practice comparing length and height, for example, when putting books back on the shelf, the children could tidy the tallest books first.
Teacher tip

### Licence

This content is © Oak National Academy Limited (2024), licensed on Open Government Licence version 3.0 except where otherwise stated. See Oak's terms & conditions (Collection 2).

## Starter quiz

### 6 Questions

Q1.
How many pens are there altogether?
Q2.
How many lemons are there in total?
Q3.
Which tower has the greatest number of cubes?
a
c
Q4.
Who has the most cakes on their plate?
Lucas
Q5.
Who is wearing the smallest hat?
a
b
Q6.
A square has more sides than a triangle. True or False?
False

## Exit quiz

### 6 Questions

Q1.
Which animal is taller?
snail
both the same
Q2.
Which line is the longest?
a - orange
c - pink
Q3.
Alex is than Sam. Choose the correct word to complete the sentence.
tallest
shorter
shortest
Q4.
The is the tallest. Choose the correct word to complete the sentence.
tree
car