How I Teach Symmetry in Kindergarten | Hands-On Lessons and Centres

October 5, 2026

Symmetry is such a fun math concept to explore in Kindergarten because there are so many ways to make it hands-on! With paper shapes, mirrors, pattern blocks and building materials, children can investigate how two halves match and use what they notice to create their own symmetrical pictures and structures.

When introducing symmetry, I start with folding and comparing shapes. Then we explore symmetry in letters and pictures, play matching games, and bring our learning into the building centres.

Here is the lesson sequence and some of the symmetry centres you can use in your Kindergarten classroom!

Introducing symmetry with paper shapes

I begin by introducing our learning goal: We are learning to identify symmetry and make symmetrical pictures and structures.

To make the idea concrete, I fold a paper shape in half and show how the two halves fit exactly on top of each other. A paper rectangle is a useful starting point because folding it down creates two matching halves.

I explain that a line of symmetry divides a shape into two matching halves. The halves are mirror images of each other, so when we fold along that line, they match exactly.

We open the shape and draw over the fold to make the line of symmetry visible. Then we try other shapes, such as a circle, heart, triangle and hexagon.

As we investigate, I ask:

How can we check whether the halves match?
What happens if we fold it a different way?
Can you find another line of symmetry?

Trying a fold that does not work is useful too! It helps children see that a line through the middle does not automatically make two matching halves.

Predicting the shape

Next, we explore what happens when we cut a shape from folded paper.

I hold up a folded piece of paper with half a heart drawn along the folded edge. Before cutting, I ask, “What shape do you think we will have when I cut along this line and open the paper? Why do you think that?”

After cutting and unfolding the heart, we look closely at the two sides and identify the line of symmetry. We can also cut along the fold and place the halves on top of each other to check that they match.

Then we repeat with other shapes and talk about our predictions.

For a related centre, children fold the Predict the Shape cards along the dotted line, predict what they will make, cut along the outline, and open the paper to check.

Often I leave the exploration at predicting, folding, cutting and checking but you can also have the students glue their finished shapes onto construction paper to create a collection of symmetrical shapes.

Looking for symmetry in letters and numbers

Once children have explored symmetry in shapes, we investigate other examples.

I start with an uppercase A and show how we can check for a line of symmetry. Then we try other letters and numbers using a small mirror or a Mira.

A Mira is a transparent reflection tool that helps children see a reflected image while still being able to see through it. It is useful for investigating symmetry and checking a matching half.

At this centre, children explore the letter and number cards and use a clothespin to mark whether they find a line of symmetry. There is also an optional recording page to help them keep track of the cards they have investigated.

One thing to keep in mind is that symmetry depends on how the letter or number is drawn. I encourage children to check the actual example on the card. We also try placing the mirror in different directions because some examples have a horizontal line of symmetry.

Playing a pattern block symmetry game

Now we are ready to build matching halves!

For this partner game, I put a strip of tape down the middle of a cookie sheet to mark the line of symmetry. Adding magnetic tape to a small collection of pattern blocks helps keep the pieces in place during the whole-group demonstration.

One partner places a pattern block on their side, starting at the line of symmetry. The other partner adds a matching block on the opposite side. Partners take turns leading and matching, with each new block touching the design.

During the demonstration, I deliberately put a block in the wrong place and ask the children to help me fix it. This gives us a chance to talk about how the blocks need to match in shape, position and orientation.

After introducing the game, I set out pattern block symmetry mats at a centre. Children can complete a half-picture or use a blank mat to create their own symmetrical design with a partner.

Playing a grid and cube symmetry game

Our next matching game uses a grid and coloured cubes.

I point out the line of symmetry down the middle of the grid. One partner rolls a die modified to show only 1s and 2s, then places that many cubes on their side. The other partner places matching cubes on the opposite side before taking a turn rolling.

The grid helps children think about distance from the line. For example, if a cube is two squares away from the line of symmetry, its partner needs to be two squares away on the other side, in the same row.

Again, I make an intentional mistake and invite the children to explain how to fix it. Counting the squares gives them a strategy they can use when they play independently.

The centre includes half-designs to complete and a blank grid for partner games or original creations.

Making symmetrical pictures with magnetic tiles

Next, we use magnetic tiles to create flat symmetrical pictures.

I begin by building one half of a house on a magnetic surface and identifying where the line of symmetry will be. Then I invite a child to build the matching half.

We look at which pieces we need and how to position them so the two sides are mirror images. This is especially helpful when using triangles, since choosing the same shape is only part of the challenge!

At the centre, children choose a card, copy the half-picture, and build the matching half. Once they understand the task, they can also create their own symmetrical pictures. An optional recording sheet gives them a place to draw and name what they made.

Building symmetrical structures with wooden blocks

For the final lesson, we move into building three-dimensional structures with matching halves.

I have the children sit in a circle and build one side of a simple wooden-block structure. Then I indicate the middle and invite a child to build the matching side.

We compare the blocks, their positions and their heights as we build. This gives children a chance to apply what they have learned about matching halves to a structure that stands up.

At the block centre, children can use the challenge cards for support or design their own symmetrical structures. They can also draw their creation on the optional My Symmetrical Structure recording page.

More symmetry centres for Kindergarten

Alongside these lessons, I offer different ways for children to revisit symmetry. You can choose a few centres that suit your class and rotate the materials as children become more confident.

Finding lines of symmetry

Children use a small frameless mirror or Mira to investigate the shapes on these pages and draw the lines of symmetry they find. For children ready for a further challenge, I ask whether any shapes have more than one line of symmetry.

Completing shapes and pictures

These reusable cards invite children to draw the missing half of a shape, letter, number or picture with a dry-erase marker. A Mira can provide support or help them check their work.

I start with simple shapes and offer more detailed pictures as children become comfortable with the task. The shape cards also include sentence options for tracing or writing.

Making symmetrical pictures with loose parts

For this centre, I set out the Make It Symmetrical mats with loose parts such as pom-poms, beads or pattern blocks. Children can add matching toppings to a pizza or matching decorations to a cookie, cake or cupcake.

As children build and play, I encourage them to check the colour, size and position of each piece. Having the same number of pieces on both sides is a starting point, but the pieces also need to sit in matching positions across the line to be truly symmetrical.

Building snap cube animals

Children complete the other half of a snap cube design and figure out which animal they have made. These mats provide another way to practise matching colours and positions across a line of symmetry.

Two versions of each animal are included, so you can choose the amount of visual support that works best for your class.

Exploring symmetry with building bricks

The building brick cards invite children to copy a half-design onto a baseplate and build the matching half. This is another way to bring symmetry into a familiar building centre.

Here, we focused on matching the shape and position of the bricks on each side. The structure’s shape is symmetrical even though the colours do not all match. For an extra challenge, children can match the colours too!

In the unit these are offered full page but I choose to print them 4 to a page to save on ink. You could also print them two to a page if you want them a bit bigger!

What I look for as children explore symmetry

As children work, I pay attention to how they check and create matching halves. Can they find the line of symmetry? Choose matching pieces? Place them in corresponding positions? Notice and adjust a piece that does not match?

I also listen to their explanations. Questions such as “How do you know these halves match?” and “What could you change here?” help me understand their thinking.

For children who need support, I use fewer pieces, simple designs and a clearly marked line of symmetry. For children ready for more, I offer blank mats, more detailed designs or opportunities to investigate additional lines of symmetry.

The folding and mirror activities help introduce the idea, while building pictures and structures gives children lots of opportunities to put that understanding into practice.

Want the lesson plans and symmetry centres?

If you would like these activities ready to use, my Symmetry for Kindergarten resource includes seven days of lesson plans, printable centre materials, building challenge cards and optional recording pages.

This unit is also included in my Year-Long Printable Kindergarten Math Bundle and the Ontario Kindergarten Math System if you are looking for lesson plans and hands-on centres to support your math teaching throughout the year!