Pictograms
A pictogram shows data using small pictures or symbols. A key tells you what each picture is worth, such as one apple standing for 2 apples. In the US it is often called a picture graph.
Maths · Ages 7–8 · 55 minutes
Children collect data with a tally chart, draw a bar chart from it with a labelled scale, and answer "how many more" questions from the chart.
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Ask the class: "Which fruit do most children in our class like best?" Take a few guesses. "How could we find out properly, without everyone shouting at once?" Steer towards asking everyone and keeping count.
Draw a tally chart with four rows: apple, banana, orange, grapes. Ask each child to vote with a sticky note, then record each vote as a tally mark while the class watches.
"One mark for each vote. When I get to five, I draw a line across the first four. That makes a gate. Gates let us count in 5s." Count the totals together: "5, 10, 11, 12. Twelve for apples."
Now turn it into a bar chart on squared paper. "Up the side is the scale: how many votes. Along the bottom are the fruits. Each bar goes up to the number of votes."
Step by step
"How many more chose apples than grapes? Apples got 12, grapes got 5. I find the difference: 12 − 5 = 7. Seven more children chose apples."