Definition
A smooth, hard-surfaced writing board used by an instructor to display written or drawn information to a class using erasable markers. In aviation training it is one of the most common and versatile instructional aids, used to sketch diagrams, list points, work through problems, and illustrate concepts as they are explained.
Plain English
A wipe-clean board the instructor writes or draws on during a lesson. Students see what the instructor is explaining as it is being explained.
Context Anchor
Seen in ground lessons, preflight briefings, classroom instruction, and other training settings where an instructor needs to show an idea quickly.
Derivation
From 'marker' (the erasable pen used to write on it) and 'board' (a flat surface). The name simply describes a board you mark on. It replaced the older chalkboard, which used chalk on a dark surface.
Why Pilots Care
Allows instructors to create and modify visual explanations in real time, helping students grasp procedures and systems more effectively than spoken words alone.
Intuition Check
Do not confuse this with a runway marking or a navigation marker. In a training context, 'marker board' just means the writing board at the front of the classroom.
Example Sentence 1
The instructor used the marker board to sketch the four forces acting on the aircraft in level flight.
Example Sentence 2
Students copied the key airspeeds the CFI wrote on the marker board.