Authors & Presenters

Kristyn Klei Borrero, EdD, is an accomplished educational leader and coach who strives to make a profound difference in the professional lives of educators. She is the cofounder of No-Nonsense Nurturer® and has served as a classroom teacher, principal, and superintendent.

MaryAnn Brittingham helps educators working with students at risk. She is an instructor and supervisor of student teachers at the State University of New York at New Paltz.

Lee Canter is a world-renowned expert on classroom management. His acclaimed Assertive Discipline® program has been the gold standard in the field since it was first introduced in 1976.

Tom Castellano has 50 years of experience in education. He shares his knowledge with educators as a consultant who offers presentations and workshops on Lee Canter’s relationship-based classroom management.

Charlie Coleman has been a principal at the high school, middle school, and elementary school levels in ethnically and socioeconomically diverse communities.

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

Tom Hierck has been an educator since 1983 in a career that has spanned all grade levels. He has been a teacher, an administrator, a district leader, a department of education project leader, and an executive director.

Yvette Jackson, EdD, is a former teacher who served New York City Public Schools as director of gifted programs and executive director of instructional and professional development.

Robert J. Marzano, PhD, is cofounder and chief academic officer of Marzano Resources in Denver, Colorado. A leading researcher in education, he is a speaker, trainer, and author of more than 50 books and 200 articles.

Christine Mason, PhD, is an educational psychologist, researcher, consultant, and mindfulness yoga meditation instructor. She facilitates dynamic workshops for educators that incorporate the latest neuroscience research with practical strategies for improving school climate and academic achievement.