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Sort objects into categories

Students will sort a collection of objects into two or more given categories based on a shared attribute (e.g., color, shape, size), placing each object into exactly one category.

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Sort objects into categories

Kindergarten · Classifying and Sorting Objects · question 1 of 3

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12 rungs. A star at the top.

Hexagons: how many?

How it is taught

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Sorting puts like things together.

A category is a matching group.

Read it: Sort, then count

5 shapes are mixed up. Sort them: the circles on top, the rest below. Now count the circles: 3.

  1. Look at each shape.
  2. Put each one with its kind.
  3. Count each group.

Sorting puts the same kind together.

A sorted group is easy to count.

Then you can say which group has more.

Sort into kinds. Count each kind.

Counting every shape and saying 5 circles.

Sort first. Only the circles count: 3.

Sort 8 shapes: 4 are circles. How many are not circles? — 4. 8 shapes, 4 circles: the other 4 are not circles.

Sort 5 toys: circles and squares

We have a pile of toys all mixed up. Let's take a look!

Some toys are circles, like balls. Some are squares, like blocks.

Let's make two groups: a circle group and a square group.

Here's a circle. It belongs with the circles!

Here's a square. It belongs with the squares!

Another circle. Into the circle group it goes.

Another square. Into the square group.

One more circle. There it goes!

Let's count: three circles and two squares.

We sorted every toy. Each one found its group. Great work!

Mixed-up toys!Sort by shape●■●■●CirclesSquares●■●■●32SORTED5toys in groups
Kindergarten · Putting things into groups by shape

What you see

While they climb, your page writes one true line to ask about tonight, and a short note each Sunday.

MayaGrade 3 · Mathematics
Did you know?

A chessboard has 64 squares — share them out between the 8 rows and each row holds exactly 8.

Today’s goal
1 star — one skill mastered, every rung of its ladder climbed
Climbing now
Divide within 100

An example student.

MayaGrade 3 · Mathematics

Maya earned 2 stars this week — Interpret multiplication as equal groups, which took 6 answers over 3 days before its star landed 3 days ago and Multiply by 6, 7, 8 and 9. Next up: Divide within 100.

An example week.

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