Authors & Presenters

Tim Solley is an experienced leadership coach for the Alabama Department of Education’s Office of School Improvement. With more than 35 years of service in public education, he was previously a classroom teacher, K–12 school administrator, and assistant superintendent.

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.

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.

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.

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.

Melody Stacy is chief academic officer for the Northern Kentucky Cooperative for Educational Services. With more than 26 years of experience amplifying school culture and student success, she has served as a teacher, curriculum specialist, and principal.

Kwame Stephens has over 20 years’ experience in education, having served as a teacher, high school principal, and consultant. In his current role, Kwame develops and facilitates professional learning opportunities in the areas of school improvement and leadership development.

Cheri Stevenson is the executive director of secondary schools for Washington County School District in Utah. She is passionate about sharing solutions she successfully implemented as a teacher, building administrator, and district director engaged in the PLC process.

Nick Stever is the principal of Bernice Ayer Middle School in San Clemente, California. With more than 20 years in education, Nick specializes in implementing professional learning communities and creating collaborative cultures that promote high levels of learning for all.

David Stewart, EdD, currently serves as assistant superintendent for school leadership and instruction at Capistrano Unified School District in Orange County, California. In his current role, he is responsible for mentoring, coaching, and supervising 18 elementary school principals.