Sixth Essential
The Sixth Essential: Because when the LEADER gets better, EVERYBODY wins.
The Sixth Essential: Because when the LEADER gets better, EVERYBODY wins.
The game plan for school improvement is not hidden. Decades of research have identified the organizational conditions that help schools improve. The challenge is not simply knowing what matters. The challenge is execution—building the leadership capacity, routines, and systems that turn what we know into consistent practice.
The Sixth Essential: A Playbook for School Leaders is a practical guide for educators ready to move from knowing what works to doing it well. Grounded in the research behind the 5Essentials and shaped by real-world school and district leadership, the book translates research into stories, strategies, and repeatable plays leaders can put into action.
“Their playbook demonstrates with specificity, clarity and discipline how to use the 5Essentials as a tool to improve.”
— Anthony S. Bryk
President Emeritus, Carnegie Foundation for the Advancement of Teaching
When leaders execute with clarity and discipline, they strengthen leadership, deepen collaboration, align systems, build trust, and create the conditions for meaningful improvement to take hold and endure.
The Sixth Essential is not an additional condition or a replacement for the original five. It is the disciplined capacity to intentionally build, sustain, and strengthen those conditions through consistent leadership practice.
If the 5Essentials help define what matters most for school improvement, the Sixth Essential focuses on how leaders make that work happen.
This is not another framework. It is a playbook for execution.
© 2026 Brian Prybil and Robert Thornell. All rights reserved.
Sixth Essential™ is a trademark of the authors.