Authors & Presenters

Keri Greener serves as assistant superintendent in Box Elder School District. An educator for more than 34 years, she has been an elementary school teacher, literacy coach, district literacy specialist, principal, and director of assessment and professional development.

Jon Grice is the director of fine arts at the award-winning Adlai E. Stevenson High School in Illinois. Previously, he served as the fine arts department chair and visual arts teacher at Riverside Brookfield High School in Illinois.

With over 25 years of experience in education, Annie Griffin has transformed classrooms and schools into positive, collaborative learning spaces. She specializes in the PLC process, rural education, literacy, and creating positive culture in schools.

Suzanne Gruendling is an experienced principal in elementary and middle school education in Vermont. She has a passion for working with guiding coalitions and collaborative teams to find the best path forward.

Mike Hagadone, MEd, served as the assistant superintendent of White River School District in Washington State until his retirement in 2020. With 40 years of experience, he is a former teacher, assistant principal, principal, and director of secondary education.

Valerie Hairston is principal of Specialist Rafael Hernando III Middle School in El Paso, Texas. With 18 years of experience, she led her school to implement the professional learning community process, establish a collaborative culture, and improve student achievement.

Katie Kreimer Hall, EdD, is the supervisor of curriculum and professional development for Fort Smith Public Schools. Previously an administrator in high-poverty schools, she is passionate about building self-efficacy in teachers through the professional learning community process to increase student achievement.

Bill Hall is the former director of educational leadership and professional development for Brevard Public Schools in Florida. He has served as a classroom teacher, assistant principal, and principal.

Rachel Hankerson is currently the principal of Yulupa Elementary School. Rachel has emphasized the importance of working as a team to ensure continuous improvement through professional learning communities, and as a leader, she is able to break down large concepts into manageable chunks, ensuring that her staff feels confident.

John Hannigan, EdD, is an author and speaker who has served in education for over 20 years as a teacher, instructional coach, principal, and county office leadership coach. His expertise includes RTI at Work™, PLC at Work®, MTSS, PBIS, restorative practices, social-emotional learning, and more.