Plain English Meaning
The student does the task and talks through it at the same time, while the instructor watches, listens, and corrects as needed. It proves the student understands the steps, not just remembers them.
Full Definition
A practice phase in the demonstration-performance teaching method in which the learner explains each step of a procedure aloud while simultaneously performing it, with the instructor observing, correcting errors, and confirming that the learner understands what they are doing and why.
Context Anchor
You will see this in flight instruction when a learner practices a maneuver, checklist item, radio call, or cockpit procedure under instructor supervision.
Why Pilots Care
This step is where real is tested. A learner who can do the action but cannot it usually has gaps that will later under workload or . Catching those gaps in training is safer than catching them in .