Data Handling
Class 4 · Mathematics
4 ideas in Class 4 Mathematics, explained in plain words, with games and quizzes to practise.
Asking a Good Survey Question
Part of: Collecting data
A survey is asking many people the same question and noting the answers. The question must be clear and ask for one answer, such as 'Which fruit do you like the most?'. A question like 'Which fruits do you like?' lets people give many answers, so it is hard to tell which one is liked most.
Why it matters. The answers we get are only as good as the question we ask. Children who learn to frame a clear question collect data they can actually use.
Try it in two minutes
- Tell your child you want to find out the family's favourite dinner. Ask 'What dishes do you like?' and notice how many answers come.
- Now ask 'Which one dish do you like the most?' and let each person answer once.
- Ask your child: which question made it easier to pick a winner, and why?
Try at home. Ask your child to frame a question to find the most liked cartoon among relatives or friends and try it out.
Recording and Counting Responses
Part of: Recording and organising data
When we ask a class a question, the answers can be noted as short letters, like D for dog and C for cat. A long list of letters is hard to read, so we count each letter and write the counts in a table. The table then shows the most common and least common choice at a glance.
Why it matters. Counting and organising answers turns a messy list into clear information. It also builds careful counting, which children need in every part of mathematics.
Try it in two minutes
- Ask 10 relatives or neighbours their favourite fruit and write the first letter of each answer in a row.
- Draw a small table and count how many times each letter appears.
- Ask: which fruit is the most common favourite? Which is the least? Do all counts add up to 10?
Try at home. Let your child count the colours of 20 vehicles passing the window and make a small table of the counts.
Reading a Pictograph
Part of: Showing data with pictures
A pictograph shows data with small pictures. A key tells how many things each picture stands for. If one picture of a cup stands for 5 cups, a row with 4 cup pictures shows 4 × 5, which is 20 cups.
Why it matters. Pictographs are used in newspapers, shops and schools to show numbers quickly. Reading the key carefully avoids the common slip of counting pictures instead of the number they stand for.
Try it in two minutes
- Draw a small pictograph on paper about the fruit eaten at home on three days, with one fruit picture standing for 2 fruits.
- Ask: how many fruits on the first day? Which day had the most?
- Change the key so each picture stands for 5 and ask how the numbers change.
Try at home. Ask your child to make a pictograph of the shoes at the door over three days and write what each picture stands for.
Sorting Data into Groups in a Table
Part of: Two groups in one table
Sometimes we sort people by two things at once, for example whether they like reading and whether they like swimming. Each person fits exactly one row: only reading, only swimming, both, or neither. A table with columns for boys and girls then shows all of this together.
Why it matters. Real information has more than one side. Reading such a table carefully teaches children to pick the right row and column and to add the right numbers.
Try it in two minutes
- Ask family members two yes or no questions, such as: do you like tea, do you like coffee?
- Sort everyone into four groups: tea only, coffee only, both, neither.
- Ask: how many like tea in all? Remember to include the people who like both.
Try at home. Ask your child to survey five friends or cousins about two games and fill in a four-row table.
What your child will practise
- Asking a Good Survey Question: Number Quest (Collect the Answer)
- Asking a Good Survey Question: Space Quick Fire (Quick Fire)
- Reading a Pictograph: Space Puzzle (Clue Puzzle)
- Recording and Counting Responses: Ocean Puzzle (Clue Puzzle)
- Sorting Data into Groups in a Table: Ocean Quick Fire (Quick Fire)
- Quiz: Asking a Good Survey Question (8 questions)
- Quiz: Reading a Pictograph (8 questions)
- Quiz: Recording and Counting Responses (8 questions)
- Quiz: Sorting Data into Groups in a Table (8 questions)