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

# Category: rational 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 … More

# 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 … More

# 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 … More

# A “juicy” dilemma

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

# So, what’s the story?

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

# 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

# Division – Whole number by fraction

During the spring of the 2012-2013 school year Kara Imm and I were working with my 5th graders to help … More

# Multiplying fractions: Why context matters

Our fifth grade team was trying to encourage students to use a visual model to represent their thinking when they … 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

# a series of sorting fractions number strings

Sorting Fractions, money, percentages or decimals Which would you rather have? 45/100 or ½ ¾ or 8/10 8/20 or 2/5 … More

# Halving with early fractions

Minilesson: Halving (Rachel Lambert) What is ½ of 1? What is ½ of ½? What is ½ of 1/4? What … More