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## GPS: Who Will Win, Lightning or Jackson?

Growing Problem Solvers provides four original, related, classroom-ready mathematical tasks, one for each grade band. Together, these tasks illustrate the trajectory of learners’ growth as problem solvers across their years of school mathematics.

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## Exploring Relative Size with Relative Risk

The Relative Risk Tool web app allows students to compare risks relating to COVID-19 with other more familiar risks, to make multiplicative comparisons, and to interpret them.

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## “Filling Bottles with Water"

When selecting mathematical tasks to use in professional development with teachers, in-service or preservice, I am always looking for ones that model effective teaching practices, give opportunities to dig deeply into mathematics, engage the learner in multiple ways, and can readily be used in the classroom. Although there are many to choose from, “Filling Bottles with Water" (Gómez and Wolfson 2012) from Mathematics Teacher, now 10 years old, is one I use that exemplifies all four characteristics.

EFFECTIVE TEACHING PRACTICES

When implementing this task, you see multiple effective teaching practices at play (NCTM 2014

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## The Magic Is in the Margins: UDL Math

In this article, I propose a mathematical version of Universal Design for Learning called UDL Math. I describe three classrooms that include students with disabilities in meaningful mathematics and explore how the teachers create access through multiple means of engagement, representation, and strategic action.

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## Making Sense of a Data-Filled World

I (JB) received a message recently that piqued my curiosity—Steve Levitt, a University of Chicago economist, famous for his book Freakonomics, wanted to talk with me. Because my contacts usually come from the world of mathematics and education, I wondered what it was that Steve wanted to discuss. What I did not know at the time was that phone call would be the start of one of the most exciting new initiatives I have encountered in my work in education, which has the potential to significantly change the mathematics we teach in classrooms. Steve became interested in

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## GPS: Socially Distant Numbers

Growing Problem Solvers provides four original, related, classroom-ready mathematical tasks, one for each grade band. Together, these tasks illustrate the trajectory of learners’ growth as problem solvers across their years of school mathematics.

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## Personal timeline

Postscript items are designed as rich grab-and-go resources that any teacher can quickly incorporate into his or her classroom repertoire with little effort and maximum impact. A personal timeline provides a rich and relevant context this month for students' to investigate numbers and number relationships.

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## Cartoon Corner: Presidential Puzzlers

A cartoon involving presidential birth dates is coupled with a full-page activity sheet.

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## Clocks: For more than telling time

Postscript items are designed as rich “grab-and-go” resources that any teacher can quickly incorporate into their classroom repertoire with little effort and maximum impact. In this article, classroom clocks are used as an effective tool to support student understanding of basic number, fraction, and geometry concepts.

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## Learning Mathematics through Minecraft

The Common Core State Standards can be taught with Minecraft, an interactive creative Lego®-like game. Integrating Science, Technology, Engineering, and Mathematics (iSTEM) authors share ideas and activities that stimulate student interest in the integrated fields of science, technology, engineering, and mathematics (STEM) in K—grade 6 classrooms.