Eyes on Math: Building Number Sense Through Sight

Hello Montessori n’ Such Community!

Did you know that children can see math before they even learn to count? It’s true! Subitizing (yes, it’s a real word!) is the ability to instantly recognize the number of objects in a group—without counting. Think of rolling a die and knowing it shows six right away. That’s subitizing!

In a Montessori environment, we know that math is more than memorizing numbers. It’s about visualizing quantities, making patterns visible, and offering hands-on materials that bring abstract concepts to life. That’s where our favorite math tools come in!

Our Black & White Bead Stair Set (1–9) and Red & White Bead Stair Set (1–9) show children how to see quantities in a linear and color-coded way. With each bead bar, a child begins to recognize the difference between 3 and 5—not by counting, but by truly seeing the size and shape. Subitizing magic! Learn more about using the bead stair with this video. 

Our Real Simple Number Blocks helps children build number recognition and understand quantity with their hands. When a child stacks the “2” block next to a “5,” they see the difference in size. These blocks are an excellent tool for reinforcing subitizing and early place value through playful comparison and creative construction.

Math is a language, and visual learners need to see the words, not just hear them. Subitizing sets the stage for mental math, pattern recognition, and number fluency. It builds the brain’s ability to chunk, sort, and solve. With Montessori materials that engage the senses, children don’t just memorize math—they experience it.

So next time you see a child lining up bead stairs or stacking number blocks, remember—they’re not just playing. They’re laying the foundation for a lifelong love of math! 

Enjoy Our FREE Printable Subitizing Cards and Worksheet

Use the finger cards- along with children's own fingers - to explore different quantities in a gun, hands-on way. Repeat the activity until children can recognize quantities instantly, without counting. 

Once they've mastered recognizing numbers 1 through 5, introduce the concept of 6 as "5 + 1." This is a great time to bring in the black- and white bead stairs to reinforce subitizing through visual patterns. 

If you're interested in exploring subitizing further and discovering ways to integrate it into your classroom, check out the math curriculum by Montessori expert Dr. Joan A. Cotter for more insightful ideas and strategies.