Address it early, privately and directly. Describe the specific behaviour and its effect instead of attacking the person. Listen fully before you conclude. Aim at a shared solution, not a verdict.
Protect people's dignity even when you are firm, because how you handle conflict teaches the whole community what your standards really are.
Prepare one calm boundary sentence in advance, before you need it.
A dance teacher sets the boundary before the room has to.
Clarity is kinder than avoidance.


