Definition of flashboards:
(n) :
(US) A board placed temporarily upon a dam, river, stream, etc. (typically within a permanent frame) to raise the water above its usual level.
(n) :
(by extension) A board that controls the flow of any material.
(n) :
Any automated display that shows temporary information.
(n) :
An electronic display that shows the winning values in various gambling games such as keno or bingo.
(n) :
(education) An acrylic board used to display children's work in a school.
(n) :
(education) A board for displaying language material in the classroom, used like a flashcard but potentially holding more information.