Purpose

To give students a piece of mathematical writing that is not their own to analyze, reflect on, and develop. The intent is to prompt student reflection with an incorrect, incomplete, or ambiguous written argument or explanation, and for students to improve upon the written work by correcting errors and clarifying meaning. Teachers can model how to effectively and respectfully critique the work of other with meta-think-alouds and press for details when necessary. This routine fortifies output and engages students in meta-awareness. 

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Adapted from Los Angeles County Office of Education: Using the California English Learner Roadmap Teacher Toolkit