Authors & Presenters

William A. Sommers, PhD, of Austin, Texas, is a teacher, principal, author, and leadership coach. He has also been a consultant for cognitive coaching, adaptive schools, brain research, poverty, habits of mind, conflict management, and classroom management strategies.

Bob Sonju is an award-winning educational leader, author, and speaker known for his energetic and passionate commitment to making the work of schools and teacher teams simple, doable, and impactful.

David A. Sousa, EdD, is an author and international consultant. He has received numerous awards from professional associations, school districts, and educational foundations for his commitment to research, staff development, and science education.

Susan K. Sparks has served as a teacher, staff developer, and executive director. Her areas of expertise include consensus building, decision making, contract negotiations, conflict resolution, strategic planning, and professional learning communities.

Jennifer L. Sparrow is deputy superintendent of Singapore American School. She spent 13 years as a middle school teacher and 11 years as a schoolwide administrator.

John Spencer is an assistant professor of educational technology at George Fox University. Previously, he spent twelve years as a middle school teacher at the Cartwright Elementary School District in Phoenix, Arizona.

Dr. Spiller is executive director of Title IX Compliance and Investigations, a new division in Richardson ISD that he has been appointed to onboard. Previously he served for eight years as the Lake Highlands Learning Community executive director in Richardson ISD, a district with more than 10,500 preK–12 students. Darwin has served as classroom teacher, assistant principal, principal, and school support officer.

With over 30 years of experience in K–12 education, author and education expert Jeanne Spiller is an associate with Solution Tree, supporting schools and districts through workshops, coaching, and collaborative initiatives to enhance instruction, foster innovation, and promote equity.

Claire Springer is a partner in education specializing in master scheduling at the elementary level, creating school systems to support the professional learning community process, and implementing data protocols to monitor high levels of learning for all. She has 13 years of experience in education, eight of those years in school leadership.

Brian M. Stack is a superintendent of schools in New Hampshire and a former principal who specializes in supporting teachers and administrators in developing, sustaining, and enhancing structures to support all learners.