Teachers and students work in close contact with each other every day. Both groups have different tasks. These must be preserved and respected by the other group.
Every teacher has the right to teach without being disturbed and thus the duty to provide good teaching.
Every student has the right to receive good teaching and the duty to provide teaching without being disturbed.
Everyone must accept the rights of others and fulfill their duties.
from Heidrun Bründel, Erika Simon: The Training Room Method. Classroom disruptions - clear rules, clear consequences (2013).