# Subtraction

## What IS Problem-Solving?

Ask teachers about problem-solving strategies, and you’re opening a can of worms! Opinions about the “best” way to teach problem-solving are all over the board. And teachers will usually argue…

## Problem Structures for Addition & Subtraction

Quick pop quiz. How many problem structures are there for addition and subtraction problems? If you said somewhere around 15 structures, you’re in the right ballpark. Unfortunately, students are often…

## Flexibility with Place Value

Just a quick post about place value and how important it is for students to be able to decompose numbers by place value in different ways. Here’s what I mean….

A sweet friend recently reminded me of an activity I created and shared a number of years ago, and I decided to dust it off and extend it! I love…

## Games for Practicing Math: Multiple Versions of Yahtzee

What makes math practice fun? Games of course! There are tons of widely available games that incorporate math skills. Today’s post explores the classic game of Yahtzee and several variations….

## Counting, Composing, and Changing Numbers

A goal of our mathematics instruction should be to help our students develop flexibility with numbers. For that to happen, children need to experience the meaning of numbers with concrete,…

## Building Understanding for the Math Operations

How did you learn arithmetic? By that I mean basic multi-digit computation, such as subtracting with regrouping, multi-digit multiplication, or “long” division. I learned totally by memorizing a series of…

## Using Precise Mathematical Language: Place Value

If we want students to use precise mathematical language (and we do!), then we have to be sure we model what that sounds like. Let’s look at some shortcuts we…

## Math Game Hacks

Kids learn better when they are engaged, and math games are extremely engaging. But we want to make sure that the practice is meaningful and that we’re using our time…