Construct viable arguments and critique the reasoning of others.
2nd Grade

Mathematically proficient students in Second Grade:

• Accurately use definitions and previously established solutions to construct viable arguments about mathematics. 
• During discussions about problem solving strategies, students constructively critique the strategies and reasoning of their classmates. 
• For example, while solving 74 - 18, students may use a variety of strategies, and after working on the task, can discuss and critique each others’ reasoning and strategies, citing similarities and differences between strategies.

Copies of this poster are available through Heartland AEA11.