Authors & Presenters

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.

Charles Farmer, PhD, has almost 30 years of experience in education and currently serves as a middle school principal. In his career, he has worked as both a high school and middle school principal and has long believed that the PLC at Work® process is paramount to successful learning.

Rob Feltner is the regional executive director for Lake County Schools in Florida. An educator for more than 28 years, he has been an elementary school teacher, assistant principal, and high school principal.

Jonathan Ferris is a program coordinator at the University of the Fraser Valley in Abbotsford, British Columbia, where he oversees practicum placements for teacher candidates, supervises faculty mentors, and teaches courses on classroom management, professionalism, ethics, and teacher presence.

Dr. JoAnne Andre-Flanagan has more than 30 years of experience in the field, where she has served across the preK–12 continuum as a teacher, building administrator, assistant superintendent, and superintendent.

Angie Freese is an author and speaker with expertise in assessment, leadership, system improvement, and strategic planning. With over two decades in education, Angie brings a unique blend of experiences that include classroom teacher, building administrator, curriculum specialist, and district leader.

Lazunia Frierson, EdD, is assistant superintendent of district and school effectiveness in a Georgia Model PLC at Work® district. She is a 24-year educator with district and school leadership experience.

Mandy Froehlich, EdD, is a passionate and experienced professional who has dedicated her career to inspiring change in teaching. She formerly served in the Ripon Area School District in Wisconsin and is currently an author, advocate, and innovator in the field of education.

Dr. Robert J. Garmston is an emeritus professor of educational leadership at California State University, Sacramento. Author of 12 books, he is the co-developer of Cognitive Coaching: Developing Self-Directed Leaders and Learners with Art Costa and co-developer of The Adaptive School: A Sourcebook for Developing Collaborative Groups with Bruce Wellmann. He has also served as an administrator, teacher, principal, and director of instruction.

Troy Gobble is principal of Adlai E. Stevenson High School in Illinois. He previously served as assistant principal for teaching and learning at Stevenson.