The Physical Pass (Most Common, K-3)
How it works: A single physical pass (a laminated card, a classroom object, a small sign) hangs near the door. One student at a time may take the pass and go. When they return, they hang it back. No pass = no going.
Why it works: The pass self-regulates traffic—students can see immediately whether going is possible. Eliminates the need for teacher decision-making on every request.
Teach it: "This is our bathroom pass. If it's here, you can take it quietly and go. If it's gone, wait until your classmate returns. No asking, no raising your hand—just check the pass."