Curriculum placement
Kindergarten. This describes the skill, not a learner estimate.
Sorting and counting
Sort objects by an attribute and count each category
Problem types
- Sort and count
- Which group is biggest?
Builds on
- Counting objects to 20
- Naming shapes · Useful idea
To sort shapes into groups and count each group, you must name or recognise each shape.
Leads to
- Reading a categorical graph
- Adding within 10 · See it applied
Joining the counts of two sorted groups finds how many there are in all.
- Comparing two groups by matching · See it applied
After sorting, the counts of two piles are compared to see which has more.
- Two-way tables · Extend the idea
Sorting by one attribute and counting each group extends to sorting by two attributes at once, which fills the cells of a two-way table.
- Unions, intersections, and complements · See it applied
Counting the objects in a sorted category is counting the members of a set, which is how outcomes of an event are counted.
Related skills
- Number bonds to 10 · Related idea
A group split into two sorted parts is a number bond: 8 shapes are 5 red and 3 blue.
- Numerals through 20 · Related idea
After sorting a group into categories, the count of each category is recorded with a numeral.
- Fractions shown by a model · Related idea
Sorting a group and counting one category gives a part and a whole, which a fraction names: 3 of 8 shapes are red.
- Counting by ones and by tens · Shared foundations
- Odd and even numbers · Shared foundations
Open the interactive map to explore lessons and skill connections.