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 … More

What’s in a name?

This post is by reader and strings enthusiast Laura Bofferding, Assistant Professor, Purdue University I was first introduced to number … More

(Re)Thinking Context

A recent conversation between two New York City math educators, Carol Mosesson-Teig and Kara Imm Kara, I have been thinking … More

Those of you who are fans of the middle school curriculum Connected Math Project (CMP) will especially appreciate this string. … More

Dot Talk: Early Numeracy

This post is from Raquel Goya, a Kindergarten teacher at Hoover Elementary in Palo Alto, CA.  Raquel noted that, “Although … More

New percentage number strings

We recently saw the problem above on a New York CCSS-M 6th grade benchmark test. A few teachers I was … More

“Stack of Bills” string

Here’s a string I designed with a team of fifth grade teachers who were looking for creative ways to encourage … More

Fractions as Operators (Dot Arrays)

Here’s a collection of strings written by teacher participants at the Summer Institute at Math in the City (City College, … More

A few weeks ago our colleague and collaborator Pam Weber Harris led a really interesting numeracy workshop at Math in … More

Challenge problems, helper problems

When designing strings, there are typically one or more helper problems before a challenge problem.  For example, you might start … More

Arrays on the West Side

We recently learned that the third grade team at Manhattan School for Children (Elizabeth Frankel-Rivera, Madelene Geswaldo, Alice Hsu and … More

How to extend a string

We are often asked about how we can “stretch” strings beyond their place as a short mental math activity in … More

Making Thinking Visible

I recently worked with a 6th grade teacher, Miss T, as she led a string for the very first time.  … More

New strings for Measurement + Unit Conversion

Our 5th grade team was trying to address several challenges with implementing Common Core 5th grade standards of multiplying and … More

A Dilemma with Models

A 5th grade teaching team I work with recently raised the issue of how to model the problem 1/2 x … More