Build Number Sense. Grow Mathematical Understanding
Developing Number Concepts | TK–Grade 2+
Help students build meaningful number relationships through experiences that grow their understanding.
Explore Developing Number Concepts

Build Foundational Understanding
Help students develop the number sense and relationships they need for future learning.
Uncover What Students Understand
Use observation and assessment to recognize each student’s current thinking.
Support Mathematical Growth
Provide meaningful experiences that build on what students know.
Explore the Developing Number Concepts Collection
Choose the resource that fits your teaching needs.
Book 1: Counting, Comparing and Pattern
Build early number concepts through hands-on experiences that develop counting, quantity, and meaningful connections between numbers.
Book 2: Addition & Subtraction
Deepen student’s number sense with experiences that encourage them to develop more flexible ways of thinking about numbers.
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Book 3: Place Value, Multiplication and Division
Extend understanding through experiences that prepare them to work with increasingly complex concepts such as place value, multiplication and division.
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Planning Guide
Make purposeful instructional decisions with practical guidance for organizing learning experiences, observing student’s thinking, and planning throughout the Developing Number Concepts series.
View Product DetailsThe Challenge
Students develop number concepts at different rates. Some are beginning to recognize quantities, while others are ready to explore more complex number relationships. When instruction moves forward before students have developed foundational understandings, gaps can grow and math can become a collection of rules to memorize rather than concepts to understand.
How These Resources Help
The Developing Number Concepts resources provide teachers with a continuum of learning experiences designed to build student’s understanding of number. Through hands-on activities and opportunities to explore mathematical relationships as it makes sense to each student, teachers can help students develop foundational understandings they need for future learning.