# Video: Division on the open number line in fourth grade

Wondering what a number string looks like in a classroom? Curious about the details of the routine? The following video features…

# A “juicy” dilemma

This number string is inspired by an investigation (Comparing and Scaling, Investigation 1.2) from the Connected Math Project curriculum for…

# So, what’s the story?

This number string attempts to do something a little different — it begins with the model (instead of the problem),…

# On the rug with Angela

It’s late in the school year and I’m sitting on the edge of the rug in Angela Fiorito’s 1st grade…

# What is the difference between Number Strings and Number Talks?

What’s the difference between a Number String and a Number Talk?

# Complications with representing constant difference on an open number line

Representing student thinking during a number string is complex. Certain strategies are particularly challenging to represent. For addition and subtraction,…

# Decimal Addition: The Wonders of Friendly Numbers & Compensation

The following post was written by Belinda Paine, an eighth grade special education teacher and one of my credential students.…

# True False and Fill in the Blank Number Strings for Second Grade

A teacher recently handed me a second grade interim assessment with some true or false and fill in the blank…

# 30 ways to make number strings more inclusive

As a teacher in inclusive settings, number strings were a critical part of my daily mathematical work.  Routines are highly…

# Why Conjectures Matter

This post is from our colleague and friend William Deadwyler, a 6th grade math teacher and strings enthusiast who works…

# What the kids say…..

I’ve known Rachel Carr for many, many years.  She shepherded me through that exhilarating and exhausting first year of teaching…

# Division of fractions — The role of ratio

A 4th/5th grade teacher I am working with planned to introduce division of fractions and needed some ideas. I…

# Beyond Skip Counting

This post comes to us from strings enthusiast and middle school teacher Marcelle Good, who works at School of the…

# Developing Algebra

This string was developed by our colleague Bill Jacob, University of California, Santa Barbara, who is, among other things, an…

# Chocolate Arrays

Lately, I’ve been seeing arrays everywhere I go: at the grocery store, at the pharmacy, at the farmers’ market. And,…

# A Number String for Angle Measures — Before We Kick the Bucket

This post was co-created by Jesse Burkett, Ranona Bowers, and Adrian Sperduto — teachers in the Hazelwood School District and…