Home | KS2 Maths Lessons | Number (estimation) | Respiratory Rate

# Number (estimation): Respiratory Rate

## Challenge level ⭐⭐

(designed for children with prior knowledge of the Year 3 and Year 4 programme of study)

Learning Objective

We are learning how to solve a natural world problem by using and applying our knowledge and skills of number and estimation.

Useful prior knowledge:

• To know how many minutes there are in an hour and how many hours there are in a day
• To multiply 2 and 3-digit numbers by a single digit

Credit: BBC Teach

## Clip Description

All living things respire. For most animals, this means taking in oxygen from the air. Oxygen is the fuel of life. Without it, muscles and organs would not work. Oxygen gets to where it is needed through an animal’s bloodstream, and it is pumped around the body by an animal’s heart.

In this fascinating clip, we see how the lungs and heart of a boy called Jamie work hard after he has been running around and kicking a ball. What do you think is meant by the words ‘lung capacity’? Watch the clip to find out.

## Quick Whiteboard Challenge

The lung capacities of the 5 children featured in the clip are shown in the table below:

What is the total lung capacity of the 5 children?

What is the average lung capacity of the 5 children?