![](http://www.alamy.com/thumbs/6/87D6FD8F-BED0-44CC-8FCC-954C94C8E4FB/DN0WJ3.jpg)
sign at blackboard
Size: 3709px × 2488px
Photo credit: © aialamy / Alamy / Afripics
License: Licensed
Model Released: None
Keywords: 3d, abstract, art, background, blackboard, blue, board, chalk, chalkboard, color, colorful, concept, conceptual, creative, curve, design, drawing, element, endless, eternal, eternity, future, futuristic, graphic, icon, idea, illusion, illustration, image, incessant, infinite, infinitesimal, infinity, isolated, light, loop, math, modern, motion, pattern, reflection, reverberation, shape, shiny, sign, space, style, stylish, symbol