Mark is our lead trainer, certified by the Positive Discipline Association to train parents and educators who teach children at the early childhood level through adolescence. Mark has taught in Montessori classrooms for 28 years in the United States and Australia. He is also an experienced Montessori teacher trainer who has published widely and delivered many courses, workshops and presentations for audiences around the world. He is also father to Bella, who in many ways has been his most profound teacher. (And she never lets him forget it!)