About Dice Dojo: Subitize & Say

Welcome to Dice Dojo: Subitize & Say  – something a little different – it’s a free, screen-based dice game built to give your little learners fast, fun, and meaningful way to practice with subitizing and some early number sense.

It’s been designed with a classroom whiteboard in mind but will also work beautifully on a laptop or a tablet in landscape mode, which makes it just as handy for whole-class warm-ups as for some practice at home.

In this game you’ll find a rolling die, three different game modes, seven different dice face styles (dots, irregular dots, fingers, tallies, ten frames, dominoes, and number tiles), a customizable number range from 1 to 10 and a color picker so your dice can match your classroom or your child’s mood.

And because we love learning through some real-world play, members can also print their very own matching dice nets. So whatever face style you’ve been playing with on screen – dots, dominoes, ten frames etc. – your little ones can fold up a paper dice that match and bring the learning from the screen into their classroom or home!

What Is Subitizing?

If “subitizing” sounds a bit fancy, don’t worry – it’s a really a simple idea with a fancy name.

Subitizing is the ability to look at a small group of objects and just know how many there are, without counting them one by one. The word comes from the Latin subitus, meaning “sudden.” When you glance at a die showing four dots and instantly think “four” – that’s subitizing in action.

There are actually two flavors of subitizing:

• Perceptual subitizing is the instant, no-thinking-required recognition of small quantities (usually up to 4 or 5). You see three dots and you know it’s three, no counting involved.
• Conceptual subitizing is what you do with bigger amounts. You see six dots arranged as two groups of three, and instead of counting “1, 2, 3, 4, 5, 6,” you think “three and three – that’s six.” You’re chunking quantities into smaller groups you already recognize.

Both types matter, and Dice Dojo: Subitize & Say gives your little learners practice with both. The dot face arrangements (and irregular dot face, ten frame, domino, fingers, number tiles and tallies) all encourage children to see numbers as patterns.

(Quick side note: you can pronounce it “soob-itize” or “sub-itize” – both are acceptable, so go with whichever feels right!)

Why Is Subitizing Important for Your Little Learners?

Subitizing is one of the most important early math skills your little learners can develop.

Very young children are sensitive to numbers and naturally compare small and large groups of objects from their first years of life, and the ability to recognize quantities without counting has a lasting influence on math development right through to elementary school and beyond.

Researchers at Stanford’s DREME Network describe subitizing as the very first way children experience quantities – starting from birth – and a foundation that many other math skills build on, including counting itself.

In other words: subitizing (in some form, even if the number words aren’t known yet) comes before counting, and supports counting.

Children who can subitize small quantities have a much stronger foundation when it’s time to count larger amounts, group numbers together, add, subtract and eventually multiply.

Here’s why it matters so much:

It builds true number sense. Mathematics educator John Van de Walle highlighted the role of subitizing in helping children understand number as a quantity rather than just a memorized symbol or sequence. When children can see that “five” means a particular amount of stuff (not just a squiggle on a page), everything that they need to learn after makes more sense.

It speeds up arithmetic. Researchers have linked early subitizing fluency to faster, more confident performance with operations like multiplication later on.

Imagine doing 4 + 3 in your head: if you can subitize four and three instantly, you’re already halfway there. If you have to count out four fingers and then three more fingers and then count them all together, you’ve used a lot of mental energy before you’ve even started the addition.

If you’d like to dig into more activities for early number sense alongside this tool, our number sense worksheets and number bond printables are great companions.

Why This Tool Is Awesome

There are plenty of subitizing worksheets and games floating around the internet, but most of them are fixed – you get what you get. This tool is a bit different, and here’s why we love it:

The three modes work together

The three game modes aren’t just three different ways to play the same game. Together they map onto the Gradual Release of Responsibility model – sometimes shorthanded as “I do, we do, you do.”

It’s a well-established framework in teaching, and the basic idea is simple: teachers first model a skill, then practice it together with the children, and finally let the children practice it on their own – so support gradually decreases as their confidence grows.

Here’s how the three modes line up:

• Free Roll Mode (I do / We do) – This is adult-led and slow paced. You roll, the children call out the number, you hide the dice, you reveal the answer. Loads of room for “How did you see it?” conversations and some super math talk. This is where the explicit teaching happens.
• Flash Mode (We do) – The dice rolls and flashes up automatically for a set time, then disappears, gives the children thinking time, and reveals the answer. It’s fast, repeated practice. Brilliant for some excited whole-class shouting-out!
• Quiz Mode (You do) – Each child sees the dice flash, then answer tiles appear and they pick the right number. Score and streak track their progress. A real chance to apply what they’ve learned independently.

Use them in that order across a week and you’ve got a beautifully structured progression from teaching to fluency to independent practice. Or mix and match however suits your class.

Seven different dice face styles

This is genuinely one of our favorite features. Rather than just plain dot dice (lovely though they are), Dice Dojo: Subitize & Say lets you switch between seven different ways of representing each number (or mix and match as you like):

• Dots – the classic dice arrangement
• Irregular Dots – dots that are not in the normal dice patterns, perfect for stretching some of that conceptual subitizing we mentioned earlier
• Fingers – hands showing the quantity
• Tallies – tally marks
• Ten Frame – the wonderful 2×5 grid that’s so important for early number sense (you can see why we love these in our pumpkin ten frame printables too!)
• Domino – a single domino half showing the value (if you like dominoes, we have this awesome domino maker tool as well!)
• Number Tiles – a visual representation of the number

You can pick one style at a time or mix it up. This is hugely powerful pedagogically because it builds flexible number sense – children realize that “five” can look like five dots, five fingers, a full row in a ten frame, or a domino half – and it’s still five.

A custom number range

The dice rolls between 1 and 10, but you can adjust the minimum and maximum to suit your group. Working on numbers to 5? Set the range to 1-5 and only those values will come up. Stretching strong children up to 10? Bump the maximum up. You can even use a mix – 3 to 8, for example – if you want to focus on a particular middle range.

A color picker

A little thing, but a nice one. Pick whatever color you’d like for the dice dots and numerals. Match your classroom theme, your kid’s favorite color, or just pick teal because I like it!

Fullscreen mode

One tap of the fullscreen button and the dice fill the whole screen – perfect for projecting onto a whiteboard so the whole class can see.

Print your own real dice (member feature)

This is one of my favorite things about this tool though! The bridge between screen and table. Digital and real world. Members (you lucky so and sos!) can save the dice they’ve been playing with on screen and download a printable PDF of dice nets to use for real! The faces match exactly what they’ve been seeing on screen, so if you’ve been playing with ten frame dice, you can print ten frame dice. If you’ve been mixing styles, you can print a set of mixed-style dice.

Print them, fold them, glue them, and your little learners have their very own physical version of the game to take to math centers, take home, or just keep in a math basket along with some manipulatives, ready to go.

Ways to Use It in Your Classroom (and at Home!)

Here are some ideas to get you rolling (yep). Mix, match, and adapt to suit your little learners.

Morning math warm-up – Pop it on the whiteboard for the first few minutes of math time. Free Roll mode, choose the representation and range that suits your learners. Roll it, kids shout the number, ask “how did you see it?” before clicking reveal. Easy way to get brains warmed up.

The full I-do-we-do-you-do progression – Start the week in Free Roll for instruction. Move to Flash Mode for repeated practice mid-week. Finish in Quiz Mode to see who’s confidently subitizing without support.

Differentiation made easy – Working with mixed-ability groups? Just adjust the range. Struggling learners can start with 1-3 with dots only. Strong subitizers get 1-10 with random representations.

Math center activity – Set the tool up on a tablet in landscape mode in a math center. In Quiz Mode, children can play independently with no adult support. The score and streak tracker keep them motivated.

1-on-1 intervention – Free Roll mode, slow pace, lots of “how did you see it?” talk. Use the hide and reveal buttons to give children time to think before showing the answer. Perfect for children who need extra subitizing practice without the pressure of a group setting.

Whole-class flash games – Project Flash Mode on the whiteboard, set rolls to 15, show time to 2 seconds, and let your class shout the answer together. I wanted this mode to almost be like a interactive video that you could tailor to your little ones.

Bridging screen to hands-on – Members can play on screen, then print matching dice nets and take the game offline. Use the printed dice for partner games, math center activities, board game style addition or subtraction games, or some take-home math practice.

Homeschool math meeting – Use it daily as a five-minute number sense warm-up. Switch representation styles each week to keep things interesting and to build flexible recognition.

Well, I think that about covers it. 

Follow the instructions below to get subitizing!

And if you find it useful, to help get the word out could you please give it a little share or tell someone else who you think would find it useful. Thanks!