# Part/Whole

## Developing Fraction Number Sense Through Part/Whole Thinking

It’s no secret that fractions are a very difficult concept for students to understand. But why is that? Fractions are an extremely abstract concept, and without adequate concrete and representational experiences that…

## The ABCs of Number Sense

Number sense.  A phrase that we hear a lot in the math world. Some kids have it and some don’t. Many adults lack number sense! But what do we mean…

## Connecting Standards: Number Combinations & Graphing

I’m always looking for ways to help students make connections between different mathematical concepts. For this activity, I’ve connected number combinations with graphing. This post contains affiliate links, which simply…

## Cube Trains: Composing and Decomposing Numbers

“More learning time in Kindergarten should be devoted to number than to other topics.”  That statement is from the introduction to the Kindergarten Common Core State Standards for Mathematics. In…

## The Evolution of a Number Bond

Number bonds help children develop an understanding of part/whole thinking and lead to working flexibly with numbers. Let’s take that idea a step further and make a case for just…

## Teaching Number Bonds

I think if you asked people to tell you what they know about Singapore Math, many would say, Oh, that’s model drawing. And while that’s one part of it, it…

## Using Number Bracelets to Develop Part/Whole Thinking

I wrote recently about using rekenreks to develop number sense, and today’s post focuses on another great tool–number bracelets. Like rekenreks, number bracelets provide concrete practice for number combinations and…

## Using Dot Cards to Build Number Sense

“…that ability to ‘just see it’ without counting is called subitizing.” (Van de Walle) There’s no doubt about it…subitizing is all the rage!  It’s not a new concept, though. According…

## DIY Rekenreks

Rekenrek translates loosely to calculation rack or arithmetic rack, and it was designed by a Dutch mathematician. The rekenrek is a great visual model for developing a strong sense of…