# Clip 18/29: Standard 1: Making Sense and Perseverance Using Algebra Part C

## Overview

*They monitor and evaluate their progress and change course if necessary...*

Jacob Disston leads a lesson on connections between ideas about equations, inequalities, and expressions, helping students to use mathematical vocabulary for a purpose to describe, discuss, and work with these symbol strings. In this clip, he asks his students to group themselves by the common features of the symbol strings, and justify their groupings to the class. This clip is also indicative of standard 3 (construct viable arguments and critique the reasoning of others) and standard 6 (attend to precision).