• How to read data from a single or multiple bar chart.
  • How to interpret stacked bar charts.
  • How to interpret horizontal bar charts, including those using a percentage scale.
  • How to find averages from bar charts.



A school was visited by inspectors in 2015, and again in 2017. On each occasion, the inspectors observed and rated forty lessons. The ratings are shown on the bar chart below.

What was the percentage increase in the number of lessons rated ‘good’ or ‘outstanding’ in 2017 compared to 2015?

Show Answer

The ‘Guide to the QTS Numeracy Skills Test’ book contains a full chapter on bar charts, including step-by-step explanations and demonstrations of all the skills that you need to know, and a practice exercise on the topic with 20 questions.

If you would like to be sent fully worked solutions to that exercise, just pop your details in the boxes and we will send them over to you.

If you are still struggling with this topic, we have created a selection of resources to provide all the help you need.


  • QTS Numeracy Revision Book – The Guide to the QTS Skills Tests book devotes a whole chapter to the topic of bar charts, with detailed methods, worked examples and plenty of practice questions for you to have a go at.
  • Practice QTS Numeracy Tests – Want to put your skills to the test and see how ready you are? Take a look at our selection of practice papers for the QTS numeracy test.
  • QTS Numeracy Revision Cheat Sheets – Our cheat sheets boil down everything you need to know to just the key points on the topic. They are a perfect resource for your last minute revision!
  • QTS Numeracy Coaching – Coaching is the ultimate in personalised support. Book your one-on-one Skype video calls where you can work through the issues that you struggle with at a pace that suits you.