Secondary maths - Water Week video

TES Secondary Maths resource collections

Water Week video

Author: Craig Barton - Maths AST and creator of (TES Name: mrbartonmaths)

In a short video for Water Week, Mr Barton takes a look at the statistical relationship between the development of a country and its access and use of water using the excellent Gapminder World.


Link to YouTube video


We start by looking at the relationship between Municipal Water Withdrawal (the volume of water withdrawal per person per year used directly by the population) and income per person. We find quite a strong positive correlation, suggesting the richer a country, the more water available to its population for their use. But this is by no means a perfect relationship, and we highlight some exceptions.

We then take a look at the relationship between Agricultural Water Withdrawal (the percentage of total water withdrawal used in agriculture) and income per person. This time we find ourselves with a negative correlation, suggesting that the more a country is developed, the less water resources it dedicates towards agriculture. Once again exceptions are highlighted, and the case Mauritius is looked at more closely.

Gapminder Word is an outstanding website which can used to quickly and dynamically display a whole host of fascinating sets of data, from life expectancy and literacy rates to the quality of a nation’s teeth. It can help give students a better feel for the world around them, and instil a greater understanding and interest in the world of statistics. If you haven’t tried it yet, I would strongly advise giving it a go!

Link to Gapminder Wold website

TES Secondary Maths teaching resources