Creating and Interpreting Bar Graphs for 11+ Maths (CEM & GL)
19 October 2026
What is a bar graph
A bar graph is a simple way to show data visually. Each bar represents a group or category, and the height of the bar shows the value for that group. In 11+ maths, bar graphs are used to ask questions about comparing, adding, or finding information from data.
How to create a bar graph
Start by drawing two axes: one for the categories and one for the numbers (the scale). Label both clearly. Choose a scale that fits your data, making sure each bar is spaced evenly. Draw each bar up to the correct value, and double-check your labels and scale before finishing.
Interpreting bar graphs
To read a bar graph, look at the height of each bar and match it to the scale. Compare bars to answer questions like 'Which is the most?' or 'How many more?' Always check the scale. Sometimes it goes up in twos, fives, or tens, not just ones.
Practical tips for parents
Encourage your child to practise drawing bar graphs with real-life data, such as favourite fruits or daily weather. Ask them to explain what each bar shows. Use past 11+ questions to build confidence in reading and comparing data.
Key insight: Most mistakes happen when the scale is misread. Remind your child to check the scale before answering any question, and to reread the question to be sure they are comparing the right bars.
