Authors & Presenters

Tammy Heflebower, EdD, is a highly sought-after school leader and presenter with vast experience in urban, rural, and suburban districts throughout the United States, Australia, Canada, Denmark, Great Britain, and the Netherlands.

Timothy D. Kanold, PhD, an award-winning educator and author, is former superintendent of Adlai E. Stevenson High School District 125, a Model PLC at Work® district in Lincolnshire, Illinois.

Joellen Killion serves as the senior advisor for Learning Forward. With more than 40 years’ experience, she leads, facilitates, and contributes to initiatives related to examining the link between professional learning and student learning.

Gail Markin is a counselor and teacher who has worked to support health and well-being across British Columbia. She began her career as a social worker, family counselor, and parent educator.

Robin Noble is an educator, author, consultant, and presenter with more than 30 years of experience in education. She is currently the director of school improvement for Santa Fe Public Schools and has served as an elementary school principal, district instructional coach, middle school English teacher, and special education teacher.

Marcia L. Tate, EdD, is the former executive director of professional development for the DeKalb County School System in Decatur, Georgia. During her thirty-year career with the district, she has been a classroom teacher, reading specialist, language arts coordinator, and staff development executive director.

Thomas Van Soelen, PhD, is a professional development trainer and leadership coach. His areas of expertise include instructional strategies, learning communities, critical friendship, leadership development, and teacher evaluation.

Todd Whitaker, PhD, is a professor at Indiana State University. Recognized as a leading presenter in the fields of education and leadership, his message has resonated with over a million professionals around the world.