What is “repeated reasoning" in MP8?

To make sense of the Common Core State Standards mathematical practice (MP) 8, this article illustrates what “repeated reasoning” means, why looking for and expressing regularity in it is such a valuable mathematical habit of mind, and how that differs from analyzing structure (MP 7) and from finding patterns in numerical results. 

Year: 
2017
Short Description: 
To make sense of the Common Core State Standards mathematical practice (MP) 8, this article illustrates what “repeated reasoning” means, why looking for and expressing regularity in it is such a valuable mathematical habit of mind, and how that differs from analyzing structure (MP 7) and from finding patterns in numerical results.
Project or Group Affiliation: 
Implementing the Mathematical Practice Standards: Enhancing Teachers' Ability to Support the Common Core State Standards