"Agile at Scale" is an excellent article co-authored by former Air Force fighter pilot Jeff Sutherland. In "Agile at Scale," Jeff and his co-authors advocate for organizational leaders to sequence Agile transformations by forming teams around customer pain points. Similar to the "definition of ready" for a team's product backlog, the authors create a "definition of ready" for launching new Agile teams.
High, Medium and No! Ruthless Prioritization Is the Key to Agile Backlog Health
Scrum in Education: What 6th Graders Can Teach Us About Teamwork
Shuhari - Mark gets his jiu-jitsu black belt!
Mark gets his jiu-jitsu black belt! Shuhari is a Japanese martial art concept, and describes the stages of learning to mastery. It is sometimes applied to other disciplines, such as Agile!