The delight of disequilibrium

Disequilibrium is Piaget’s term to describe when what a learner already knows comes into conflict with new information. Learners must…

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…

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

Now that we’re moving into spring, I wanted to be sure my kindergarteners were beginning to gain a foundation for place…

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

Defining the Problem: In a recent workshop, a third grade teacher shared the following: “I think I’m doing it right,…

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

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

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

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

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

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

I recently reached out to Willem Uittenbogaard. Willem was one of the original collaborators between Math in the City (founded by…

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

My name is Jennifer DiBrienza. I taught elementary school in New York City public schools for 9 years and began…

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