Authors & Presenters
- Kristyn Klei Borrero
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
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
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
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.
- Alan J. Cohen
Alan J. Cohen is a tenured teacher in the New York City Department of education. He has taught children from many different socioeconomic backgrounds and with a wide range of behavioral needs.
- Charlie Coleman
Charlie Coleman has been a principal at all school levels (traditional K-12, plus alternate, virtual/online and blended learning) in ethnically and socioeconomically diverse communities. He is currently District Principal of Indigenous Education.
- Jessica Djabrayan Hannigan
Jessica Djabrayan Hannigan, EdD, works with US schools and districts to design and implement effective social-emotional and behavioral systems. Her expertise includes RTI, PLCs, MTSS, PBIS, restorative practices, social-emotional learning, and more.
- John Hannigan
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.
- Tammy Heflebower
Tammy Heflebower, EdD, is a highly sought-after school leader and educational speaker with vast experience in urban, rural, and suburban districts throughout the United States, Canada, the Netherlands, Denmark, and Australia.
- Tom Hierck
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.