# Tuck Shop

Pupils are asked to draw graphs to represent data and to critique an erroneous interpretation of the data.

# Practical details

Suitability
National Curriculum levels 4 to 5
Time
30 minutes to 1 hour
Resources
Ruler, pencil and graph paper

# Key Processes involved

Representing
Choose a way of representing discrete data using a chart or graph and an appropriate method for evaluating a conclusion about the data
Analysing
Compare two proportions and make deductions
Interpreting and evaluating
Engage with someone else's reasoning and identify errors
Communicating and reflecting
Communicate their findings clearly

# Teacher guidance

Check that pupils understand the context before they begin, for example, issue the task and ask questions such as the following:

• What is the purpose of this survey?
• What was the survey question?
• Why would they want to ask this question?
• How many people responded?

Pupils can tackle this task in different ways, but they might be expected to:

• solve simple problems involving ratio and direct proportion
• understand and use the mean of discrete data
• group data into equal class intervals where appropriate
• represent collected data in frequency diagrams
• interpret graphs and diagrams and draw conclusions