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 … More

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

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 count around for fractions

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

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 … More

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 … More

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

Searching for Friendly Numbers

Students who are working to become efficient with fractions must learn to seek out “friendly” numbers — a shifting target … 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

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

Fractions as operators on money (Early fractions)

Fractions as operators, Money What is ½ of \$1.00? What is 1/4 of \$1.00? What is 2/4 of \$1.00? What … More

Doubling with early fractions

Number String: Doubling 4 x 2 1/4 x 2 1/10 x 2 1/5 x 2 2/5 x 2 4/5 x … 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