visual aid

American  

noun

1. any of various materials depending on the sense of sight, as films, slides, photographs, etc., used as aids in teaching.

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Etymology

Origin of visual aid

First recorded in 1910–15

Example Sentences

"It's not about seeing the disability aid or the visual aid," he said.

From BBC

As for its color, the company said it is "a visual aid for pilots and firefighters alike."

From BBC

That's admittedly not the easiest visual aid to digest, so here's a summary: The total amount of such debt in the U.S. increased over those 15 years to a level of 220, or slightly more than double the amount that existed in 2007.

From Salon

Rim a glass with fiery spices for a bit of heat, or add a sprig of thyme or rosemary for a subtle earthy flavor and a stunning visual aid.

From Salon

“You use these charts as a visual aid,” Goodman said.

From Seattle Times