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🗂️ Sorting Data into Categories

Organize objects into two or three categories, count each group, and answer questions like which group has more and how many there are in all.

3
lessons
~20 min
to learn
🔢 Math
subject
Ages 6–12
level
Start the course →

What you’ll learn

  1. Make CategoriesOrganize objects into two or three named categories and record them in a table.A category is a group with a name. To organize data, choose two or three categories and place each object into exactly one. A simple table listing each category and its count captures the whole data set at a glance.
  2. Count and CompareCount each category and compare them, including 'which has more' and 'how many more'.After sorting, count each category. Comparing tells which has more or fewer — the longer bar wins. 'How many more' asks for the difference, which you find by subtracting the smaller count from the larger one.
  3. Find the TotalFind the total number of data points across all categories by adding.'How many in all' means add every category together, and the total is the same no matter what order you add in. Knowing whether a question wants a total (add) or a difference (subtract) is the key to answering data questions.

Questions this course answers

What is a category?

A category is a named group that data is sorted into.

A green apple and a red apple both go in which category?

Both are apples, so both go in the apple category — color does not matter.

Which word tells you to ADD every category together?

'In all' asks for the total, so you add all the categories.

Apples 6, bananas 4, grapes 2. Which has the FEWEST?

2 is the smallest count, so grapes have the fewest.

Does adding the categories in a different order change the total?

Order does not change a sum; the total is the same either way.

Grounded in trusted sources

  • National Council of Teachers of Mathematics (NCTM)
  • Khan Academy Kids
  • PBS Kids — early math
  • NAEYC — early math learning

Every Wunder lesson is built from real, reputable sources — never invented.

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