"AMI teacher trainers must have studied Montessori for at least 10 years before they begin to teach others to teach (1 year of their own training, a minimum of 5 years as a classroom teacher, and then at least 4 years apprenticeship to other trainers). AMI teacher trainers must pass rigorous standards before taking on the training role, standards measured by their writing a dozen essays on specific topics concerning Montessori education. "
Please note that we are an AMI school which is why I found this quote interesting. I have no idea how trainers in other associations are trained and would love to hear about some of them. Feel free to comment so we can all share!