Clip 17/41: Standard 3: Construct Arguments & Critiques Using Decimals Day 2E
Overview
Mathematically proficient students….justify their conclusions, communicate them to others, and respond to the arguments of others.
Erika Isomura’s 5th-grade students continue to work in pairs to classify, sort, and glue down decimal representations in numerical order. Erika invites her students to compare their work to their work for prior investigations and other problems. She reminds each partner to contribute equally to the pair work. She asks “How did you get that? Can you show it to me in a picture or with numbers?” She challenges partners to contribute to their pair’s mutual work: “Make sure he's proving it to you. Don't just let him talk it out.” As partners finish their work, Erika invites them to do a “gallery walk” of other pairs’ work to check and compare their work. This clip also relates to standard 1 (make sense of problems and persevere in solving them), standard 6 (attend to precision), and standard 7 (look for and make use of structure).