Clip 24/43: Standard 6: Attend to Precision Using Algebraic Equations Part Intro C
Overview
Mathematically proficient students try to communicate precisely to others. They try to use clear definitions in discussion with others and in their own reasoning.
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, his students have grouped themselves by the common features of the symbol strings. Disston then asks the students to explain their groupings, saying "Oliver, you had another whole category. Who are you standing with? … Why are you guys saying you guys are similar? You want to tell us?" He involves the whole class in evaluating the groups’ justifications. This clip is also indicative of standard 1 (make sense of problems & persevere in solving them) and standard 3 (construct viable arguments & critique the reasoning of others).