Transmitting Mathematical Notation

On the line below this …
Equation for a Circle - Algebra 2

The equation given …
Work problem

Andrei can build …
Infinity

On your website it states …
square roots

i need step by …
Simple Math Problem

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What percent increase is it from $59,205 to $60,245? Can you please … Click here to write your own.

In this Number Talk, Stephanie Letson engages her 2nd grade students in finding multiple ways to write equations that result in the number 170. She introduces her students with some norms for their learning, such as listening, sharing, writing. She introduces the day’s number by asking them what they notice about the number, and what those noticings (multiple of ten, even number) might mean for their equations. Students work individually, then share in small groups, then share as a whole group. Letson facilitates their discussion and follows student insights when they are offered.