# Talking Time

This activity helps students understand the different ways that people talk about time. They will read different descriptions of time—for example 5:15, 15 after 5, or a quarter after 5—and try to set a clock to that time. Teachers will see which time formats are easier or harder for students.

Teachers will have the opportunity to discuss with students how different ways of talking about time aren’t right or wrong or smart or dumb. Rather, they’re useful or less useful, and that’s evaluated not by an answer key but by the people who are talking with each other.

## Marcellus the Giant

This activity will help your students understand the definition of a proportional relationship. They'll create a giant and then make sure all of his features are proportional. They'll see the…

## What’s My Number?

In this activity students develop their intuition for mean absolute deviation. We start with a simple question: "Can you guess my number?" Students submit a guess, receive feedback (too low,…

## Polygraph: Shaded Rectangles

This Custom Polygraph is designed to spark vocabulary-rich conversations about fractions and part-to-whole relationships. Key vocabulary that may appear in student questions includes: shaded, unshaded, fraction, part, whole, numerator, denominator,…

## Strength in Numbers

In this activity, students complete three rounds of estimation challenges. After each initial estimate, they view a dot plot of their classmates' responses and decide whether (and how) to revise…

## Card Sort: Exponentials

In this activity, students practice what they've learned about exponential functions by matching equations to properties of the graphs they will produce. They will then use their knowledge of transforming…

## Classy Cats

In this activity, students will begin to see a set of data points as a single thing that can be analyzed, not just a bunch of disconnected points. Students learn…