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Darin L. Fahrney, PhD, is the coordinator for strategic implementation and an upper school teacher at the American International School of Zagreb, Croatia. He brings a broad range of experience and expertise to his work, having previously served as a high school principal, learning support coordinator, gifted and talented coordinator, contributing author, researcher, and consultant.

Daniel Cohan retired in 2023 as chief of schools for the Jefferson County Public School District in Colorado, where he supervised elementary, middle, and high schools, K–12.

Clara Sale-Davis takes no excuses for low performance, and she sets an inspiring example for all students, noting that “all means all.” Born, raised, and educated in Texas, she worked in the Brazosport Independent School District in Freeport for 32 years.

Chris Jakicic, EdD, an author and a consultant, was principal of Woodlawn Middle School in Illinois from 1999 to 2007. She began her career teaching middle school science.

Cheryl O’Leary is principal of Thomas Edison Primary School, a Title I school located in Kankakee, Illinois. Cheryl implemented professional learning community concepts and results-driven professional development that brought about substantial, schoolwide change.

Charlie Coleman has been a principal at the high school, middle, and elementary school levels in ethnically and socioeconomically diverse communities, where he effectively decreased behavior problems and increased academic success. Creating positive learning environments for ALL continues to be a priority for Charlie, and he has experience improving school culture in many schools, K–12.

Cassandra Erkens is the author of eight books with more currently in progress, as well as chapters in several anthologies. Additionally, she is a facilitator, a trainer of trainers, an educator, and a coach. Her work focuses on educational topics, including assessment, instruction, leadership, school improvement, and professional learning communities.

Brian M. Pete comes from a family of educators—college professors, school superintendents, teachers, and teachers of teachers. He has a rich background in professional development and has worked with adult learners.

Brian K. Butler is an educational presenter with over 30 years of experience who has worked with thousands of schools throughout the U.S.A., Australia, and Canada presenting on the PLC at Work and RTI at Work models. Brian is a retired principal who last served at Mason Crest Elementary School in Fairfax County, Virginia in 2017. Under Brian’s leadership, Mason Crest received Solution Tree’s first annual DuFour Award in 2016.

Brandon Jones, an author and consultant, works with educators to implement the Professional Learning Communities at Work® and RTI at Work™ processes. As a practitioner, he has served as a high school teacher and assistant principal, as well as a principal at the elementary, middle, and secondary level.