A Common Core Standard: "Critique the reasoning of others"

I was reading about the NYC gap apps challenge which is aims to build skills in the 8 Common Core Standards for Mathematical Practice:
*Make sense of problems and persevere in solving them
*Reason abstractly and quantitatively
*Construct viable arguments and critique the reasoning of others
*Model with mathematics
*Use appropriate tools strategically
*Attend to precision
*Look for and make use of structure
*Look for and express regularity in repeated reasoning

Has anyone effectively found a way to have students "critique the reasoning of others" or is this something that's in the common core but not used in practice?