Positive Discipline in the Classroom (developed by Jane Nelsen and Lynn Lott) is a research-based classroom management program that empowers teachers with skills to build their students’ sense of community, prepare them for successful living, and increase academic achievement. Attend the 2-Day Training or bring the training to your school. Positive Discipline in the Classroom materials go hand in hand with the Positive Discipline Parent Education Program that can be taught at your school to increase the parent-school connection.
https://www.positivediscipline.com/teachers
Another Organization, I'm not sure if a connection
https://www.positivediscipline.org/classroom-educator-training
In the UK:
http://www.positivediscipline.co.uk/classroom-educator-training.html