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# Counting Principles – Subitizing

This is a first blog post in a series about Counting Principles. These principles are helpful when developing children’s number sense. It’s not enough for them to learn to count by rote, they have to develop a strong foundation of numbers and counting.

Subitzing is the first principle that I am taking a deep dive into.

What is Subitzing?

It is the ability to tell the number of objects in a set without counting. There are two types of subitizing skills: perceptual subitizing involves looking at a small set of objects and knowing the number without counting (4 dots), conceptual subitizing means that you can recognize small sets within a group without counting and adding them together (three dots plus three dots makes 6 dots).

### Why is Subitizing important?

Developing this skill helps develop children’s math fluency skills, and mental math abilities.

### Activities to Work on Subitizing Skills

Number Talks are a great way to work on subitizing skills. There are so many different ways that you can do a number talk. I’ll explain to you my favourite way:

I made a video tutorial explaining how I do my Number Talks in Kindergarten:

I use these packs during my Number Talks. I put each of these sets on rings so that I can do a quick Number Talk whenever I have a minute:

Subitizing Cards

To practice subitizing sets of numbers, I would put these cards upside down on the table and have students turn them over and write the number without counting. You could use whiteboards, blackboards or magnetic boards. Students could also hold them up for each other an play in pairs with the cards.

If you would like to use these cards, they are a free download in my Resource Library (if you do not have he password, sign up for my newsletter and it will be sent to you):

Spin and Cover Subitizing Game

If your students need more practice with their subitizing skills, these Spin and Cover workmats are perfect for independent math centers:

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