About Kathy: Kathy Minas is a 5th grade teacher at a public school in Los Angeles. She is an enthusiastic mathematician…

# Keeping our math communities humming

In this post, Kara Imm shares a May 2020 interview with Kate Smallberg about how to transition our number strings…

# The Mathematics of Core Sampling: Division of Fractions

About the Co-Authors Keely Zaientz and Corey Levin teach 6th and 8th grade math in an integrated co-teaching classroom at…

# 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…

# Learning to “trust the ten”—Developing a community of first grade mathematicians

Teacher-author Lindsay Pardeck is in her 7th year of teaching first grade at Eureka Elementary in the Rockwood School District.…

# Jenna Laib’s Blog: Daysha at the Board: Assigning Competence

https://jennalaib.wordpress.com/2019/03/02/daysha-at-the-board-assigning-competence/ Jenna Laib wrote this post for her blog on a moment in which she was teaching a number string…

# Prime Climb Number String

Last month, I worked in Andrew Eller’s amazing 4th grade classroom in Los Angeles that was beginning an exploration of…

# Differentiating Number Strings: The BandAid Problems

How do you plan a number string for a group of learners who are working on very different skills in…

# Trusting the digits: Developing place value understanding

For several years, across various school communities, a teacher will tell me, “My kids don’t really have a strategy for…

# Life beyond the algorithm: Division of decimals

About the author: Kit Golan Kit is an MfA Master Teacher teaching 6th and 7th grade math in a NYC…

# Biking on the fractional number line . . .

The following post comes from Rafael Quintanilla, a Mathematics Instructional Coach for the Los Angeles Unified School District and a…

# A count around for fractions

This February, I led a Number Strings Writers’ Retreat, as part of my role as staff developer at Math in…

# Number string structure and design

How are number strings designed? Typically, people tend to describe number strings as having the following structure Entry problem Helper…

# Cars, coffee, and climbing stairs: Inviting students into the story

Here’s another important contribution from our friend and colleague Marcelle Good — a 6th grade teacher at School of the…

# Feet, inches and yards: Conversions on a ratio table

This post is from our friend and colleague Kathy Minas, a 4th grade teacher at PS 158, and an avid…

# Numeracy for high school: A unique challenge

Here’s a conversation between collaborators and friends Kara Imm (Co-Director, Math in the City) and Geoffrey Enriquez (Math Teacher, Vanguard…