Subitizing Craze

Written by Donna Boucher

Donna has been a teacher, math instructional coach, interventionist, and curriculum coordinator. A frequent speaker at state and national conferences, she shares her love for math with a worldwide audience through her website, Math Coach’s Corner. Donna is also the co-author of Guided Math Workshop.

Is it just me, or does it seem like subitizing was part of every class that every primary teacher attended this summer?  I’m heading north to Connecticut today to get my son moved in at college (gulp!), but I wanted to make sure you’d seen these posts on subitzing.

Foundational Numeracy Skills
Be Wise…Subitize
It’s All in How You Interpret It

And here are some pictures of one of my Kinder teachers subitizing with her kids.

Daily subitizing routine.  Some kiddos saw two groups of 3.  Some saw 3 groups of 2.

Tricky one, huh?  Not for these kinder friends!

Almost too easy for them at this point.  Hooray!


  1. Primary Paradise

    Hi Donna, love your posts on subitizing. We really reinforce dot cards and ten frames in kindergarten and first grade. I have math strategies posters on TPT for free if you want to take a look.

    • Donna Boucher

      Hey Tammy! So glad to hear that your teachers are subitizing! Thanks for the hot tip on the posters. Here’s the link for anyone who’s interested: Addition Math Strategies

    • Hanounaa

      Thanks Tammy, I am now following you. I needed a poster for the addition table +1!

  2. Bon Crowder

    Subitizing is one of those things that parents of little ones likely have never heard about, and probably should. Even as a mathematician I had no concept of subitizing before I had a little one of my own.

    Here’s what I wrote as soon as I began learning about it:

    Thanks so much for the links! I’m off to read more about it now.

    • Donna Boucher

      You’re absolutely right! I think many teachers are just know hearing about subitizing. Of course, many have probably been doing it in their classroom–they just didn’t know the name for it.

  3. Hanounaa

    Hi Donna. What do you think of the 4 group math thing? Do you know it? Thanks.

    • Donna Boucher

      I’m not familiar with 4 group math, but I looked at their website. It seems to be based in subitizing and number sense, so that can’t be a bad thing.


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