Mathematics · 2nd Class

Active learning ideas

Creating Block Graphs

Let's turn your pupils into data detectives! This topic helps them collect clues from the world around them and present their findings in a colourful, easy-to-read block graph.

• NCCA Curriculum Specifications
• PSMC: Data - Representing and interpreting data - Represent data using block graphs

• 30–45 min
• Pairs → Whole Class
• 3 activities

Activity 01

• Plan-Do-Review
• 45 min · Whole Class

Our Favourite Things

Pupils decide on a topic, such as favourite fruit, pet, or season. They survey their classmates, record the data using tally marks, and then create a large class block graph on poster paper or the whiteboard.

Explain how the number of tally marks connects to the number of blocks coloured.

Facilitation Tip

Model the process of converting one person's vote from a tally mark to a coloured block to reinforce the connection.

What to look for

Observe pupils during a group activity. Note their ability to translate tally marks to blocks and listen to their discussions about what the data shows.

• Remember
• Apply
• Analyze
• Self-Management
• Decision-Making
• Self-Awareness

Activity 02

• Plan-Do-Review
• 30 min · Pairs

Classroom Treasure Hunt

In pairs, pupils are given a list of items to count in the classroom (e.g., windows, tables, red copybooks). They record their findings and then individually create a block graph in their maths copybook to show what they found.

Justify the labels you used on your block graph.

Facilitation Tip

Ensure the items to be counted have a manageable quantity that will fit on the graph paper provided.

What to look for

Provide pupils with a simple tally chart and a blank graph template. Ask them to create a complete and accurate block graph independently, including a title and labels.

• Remember
• Apply
• Analyze
• Self-Management
• Decision-Making
• Self-Awareness

Activity 03

• Plan-Do-Review
• 35 min · Small Groups

Lego Tower Graph

Give small groups a collection of multi-coloured Lego bricks. Their first task is to sort the bricks by colour, then create a physical block graph by making a tower for each colour, which they then translate onto graph paper.

Identify the scale on the side of the block graph.

Facilitation Tip

This activity helps bridge the concrete (building blocks) to the pictorial (colouring blocks on paper).

What to look for

Give pupils a simple checklist with 'I can...' statements, such as 'I can give my graph a title', 'I can label the axes', and 'I can colour the correct number of blocks'.

• Remember
• Apply
• Analyze
• Self-Management
• Decision-Making
• Self-Awareness

A few notes on teaching this unit

Begin by building physical graphs with linking cubes or blocks to make the concept tangible. Then, model the entire process on the board, from writing the survey question to labelling the finished graph. Use a 'think aloud' strategy to explain why you are adding a title, labels, and a scale. Co-create a checklist of 'must-haves' for a good graph that pupils can refer to.

By the end of this topic, your pupils will be able to conduct a simple survey, record their findings with tallies, and construct a clearly labelled block graph to represent the data.

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Watch Out for These Misconceptions

• Pupils start colouring blocks from the top of the column downwards.

  Explain that graphs are built from the ground up, just like a building. The first block should always be coloured at the bottom, touching the horizontal axis (the 'floor').

• The numbers on the vertical axis (the scale) are just labels and don't need to be evenly spaced or start at 0.

  Show how a proper scale, starting at 0 and going up in ones, ensures the graph accurately shows how much or how many. Use a ruler or the lines on the paper to demonstrate consistent spacing.

• Forgetting to include a title or labels for the axes.

  Explain that without a title and labels, the graph is a mystery picture. The labels tell us what we are counting, and the title tells us what the whole graph is about.

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Methods used in this brief

• Plan-Do-Review