The science comes from knowledge of child development and structure of the curriculum. Importance of displaying children's work. The teacher can move towards more flexibility after a while. Rules are a starting point, the end is for children be able to flexibly use and create them. From a developmental point of view, discipline is a set of attitudes.
Children usually follow the lead of a competent, confident teacher.
Parents who feel respected by the school generally are supportive of its activities and pass on this respect to their children. Class size is a critical component. The importance of one on one contact between teacher and student. Diversity should be honored but a focus on differences can be self-destructive. Cooperative learning with children working in pairs or small groups is productive.