Composing & Decomposing

Engaging Games for Composing and Decomposing Numbers

After spending several weeks exploring number bonds, this week I’ve been working with my firsties on composing and decomposing 5. This has been such a fun week as we used…

Developing Part/Whole Thinking

I’ve been working with my firsties on composing and decomposing the numbers 3, 4, and 5. This post contains affiliate links, which simply means that when you use my link…

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…

Exploring Numbers to 120โConcrete, Representational, and Abstract

First Grade standards indicate that students should compose numbers to 120 in “more than one way, as so many hundreds, tens, and ones.” This leads to thinking flexibly about numbersโhelping…

A Mathemagician’s Game for Making Ten

When I was a campus-based math instructional coach, my office was across from the 2nd Grade pod. One year, one of the teachers had a student who benefitted from leaving…

Cube Trains: Composing and Decomposing Numbers

“More learning time in Kindergarten should be devoted to number than to other topics.”ย  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…

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

โโฆthat ability to โjust see itโ without counting is called subitizing.โ (Van de Walle) There’s no doubt about it…subitizing is all the rage! ย It’s not a new concept, though. According…