Subitizing games are a fun way to build number sense in the classroom.
Our math curriculum includes a simple roll-and-record game that my students absolutely love. It keeps coming back throughout the year in different forms – writing numbers, counting dots, building addition problems – and every single time I pull it out, I hear cheering.
“Do we get to play the dice game today?” That’s always the first center that fills up. Kids beg for it again and again.
What they don’t know is that each time they play, I’m quietly tailoring that “game” to exactly what they need to practice. They think they’re just having fun. They are – but they’re also building subitizing skills without even realizing it.
That’s the magic of a good math game. And it’s why subitizing games are one of my favorite tools in the classroom.
What is subitizing?
Subitizing is the ability to instantly recognize a quantity without counting – like knowing you rolled a 4 on a die without counting the dots. It’s a foundational math skill that supports number sense, addition, subtraction, and mental math. For a deeper look at what subitizing is and how to teach it well, How to Teach Subitizing: 5 Mistakes to Avoid is a great place to start.
How can I help my students with subitizing?
This is where subitizing games and fun number sense activities come in. The most helpful thing for subitizing is anything that has children quickly look at a set and identify the quantity without counting. Here are some ways to do that:
Flash Dot Pattern Cards
Use cards that have groups of dots on them. (This can be as simple as a paper plate with dot stickers or dots drawn with markers). Quickly show the dot card (for literally a second), then lay it down. Students name the number of dots they think they saw. Then show it again and check. (This can be done with a group of students or with individuals.) As a variation, you can rapidly hold up fingers on your hand, then hide them.
First focus on quantities of 1-4 (for perceptual subitizing). As students become successful with those, move on to larger sets (for conceptual subitizing). Have students talk about how they “saw” small groups within the larger set.
Subitizing War Games
In Subitizing War, each student flips over a card and quickly names the number shown – without counting. The child with the greater quantity keeps both cards, just like the traditional war card game. As students gain more confidence, you can add cards with ten-frames, tally marks, and finger patterns to keep building skills.
Ready to skip the prep? Subitizing War includes dot patterns, finger patterns, ten-frames and tally marks – everything you need for a fast-paced game your students will beg to play again and again.
Just getting started or working with younger students? The free Ten Frame War game is a great low-prep entry point for numbers to 20.
Memory/Concentration
Make dot cards with dot patterns and numerals, or two different dot patterns for each number. Lay the cards out in an array. Students turn over two cards and quickly name the number/quantity shown. If they match, they keep the cards, if not, turn them back upside down in the array.
Find the Card with ___
Students lay out several dot pattern cards or dominoes on the table in front of them. Any set of dot pattern cards works well for this activity: domino cards, dot cards, or ten frame cards all fit the bill.The teacher says a number and students quickly find a card that represents that number.
Want everything in one place?
If you’ve tried Subitizing War and want to build out a full subitizing games library, the Subitizing Games Mega Bundle has you covered. You’ll get five war games, 15 I Have… Who Has…? games, and subitizing flash cards – all in one set, with materials for numbers up to 10 and beyond to 30.
A few final tips for subitizing games:
With all of these activities, keep in mind that the purpose is to rapidly identify the quantity, not to count the dots. As students play some of these games with partners, you will want to emphasize that they should say a number first, then count to check.
Once students become familiar with some of these subitizing activities, you can use them as transition activities in your day. They are also a great addition to a soft start to your school day. My students LOVE playing math games, and don’t even realize they are learning as they play!
Finally, remember that perceptual subitizing (small sets) occurs before conceptual subitizing (combining/decomposing larger sets). So stick with sets with 1-4 dots (or finger patterns, ten-frames, etc.) until your students are able to rapidly recognize these sets. Then move on to numbers to 10 and beyond.
A solid understanding of number sense in kindergarten will support mental math in older grades. Have fun helping your students develop stronger number sense!
You might also like:
- How to Teach Subitizing: 5 Mistakes to Avoid – common missteps when teaching subitizing, and simple fixes for each one
- How to Use Subitizing Cards in the Classroom – practical routines for using subitizing cards in K-1, from flash cards to morning meeting
- Number Games for Kindergarten – more game-based math ideas to build number sense alongside subitizing games
