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The 3 Key Counting Principles Every Parent Should Know to Boost Early Math Skills

Updated: Apr 10


Child's hand laying connecting cubes end to end and comparing with larger laying down tower of connecting cubes.

Counting is one of the foundational skills for mathematical success. Many people don’t realize that counting is more complex than simply reciting numbers. To become proficient at counting, children need to understand three essential counting principles: ordered sequence of counting numbers, one-to-one correspondence, and cardinality. These principles are crucial in helping children develop a strong mathematical foundation.


In this post, we’ll dive into each of these counting principles and provide practical tips to empower you to help your child become a confident, successful counter.


1. Ordered Sequence of Counting Numbers

Also known as the verbal count sequence, this principle emphasizes the importance of following a consistent order when counting. Every number must be assigned to objects in the same sequence, starting from one.


What it might look like in development: Children often demonstrate an incomplete understanding of this principle by skipping numbers or repeating them. For example, a child might say, “1, 2, 5, 7, 2, 3,” which shows that they haven't fully mastered the ordered sequence yet.


How to support your child:

  • Model correct counting: Whenever possible, model using the correct sequence. Embed this into everyday activities such as counting when going up steps or timing how long it takes to put toys away.

  • Use counting songs: Songs with both counting and movement are a fun way for children to internalize number sequences.

  • Practice counting physical objects: Encourage your child to count tangible items. This can be done during daily activities such as playing with a set of small toys or having a snack.


2. One-to-One Correspondence

This principle involves assigning exactly one number from the counting sequence to each object being counted. One-to-one correspondence ensures that each object gets counted once and only once.

What it might look like in development: Children may double-count objects or skip them, which indicates that they haven't fully developed this skill. They might point to an object twice or miss objects entirely during counting.

How to support your child:

  • Encourage physical interaction: Have your child touch, move, or point to each item as they count. This helps reinforce the idea that one number corresponds to one object.

  • Ask guiding questions: After they count, ask, “How do you know which items you’ve already counted?” This encourages children to think through their counting process.

  • Have your child count while placing items in a container: For example, when tidying up, have your child count each toy as they place it in a bin. 


3. Cardinality

Cardinality is the understanding that the last number recited when counting represents the total number of objects in the group. It’s not enough to count correctly—children need to grasp that the final number is the answer to “How many?”

What it might look like in development: Children may struggle with this concept by either beginning the count again after being asked “How many?” or giving a random number instead of the last number counted.

How to support your child:

  • Ask “How many?” after counting: Reinforce cardinality by asking your child how many objects there are once they’ve finished counting.

  • Emphasize the final number: When counting with your child, restate and highlight the last number. For example, after counting four blocks, say, “There are four blocks in total.”


Concurrent Development of Counting Skills

It’s important to recognize that these three counting principles—ordered sequence, one-to-one correspondence, and cardinality—don’t develop in isolation. Children may grasp parts of one principle while still working on others. For example, a child might know the correct sequence of numbers but struggle with matching one number to one object (one-to-one correspondence). Or, they might accurately match each object to a number but still not understand that the final number represents the total count (cardinality).

Understanding this overlapping development can help families be patient and provide targeted support where needed.


Supporting Your Child’s Counting Journey

Teaching children how to count is more than just saying numbers out loud. By becoming familiar with these three counting principles, families can more

effectively support their child’s mathematical development. Whether through play, daily activities, or simply asking thoughtful questions, you can help your child become a confident and capable counter.


For more on the Three Counting Principles, check out our video!



Follow Us for More Math Strategies and Resources

We have lots more resources so that you can support your child in becoming excited, confident, capable doers of mathematics. Follow us on Instagram and YouTube to stay up to date! @MathHappinessProject

 
 
 

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