close up image of a pile of white chalks on a black board with written mathematical equations

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Size: 4608px × 3072px
Photo credit: © Ullyssis Patorito / Alamy / Afripics
License: Royalty Free
Model Released: No

Keywords: black, blackboard, board, bunch, calcite, calcium-based, carbonate, chalk, chalkboard, chalks, close, closeup, drawing, dustless, education, formula, gypsum, handwriting, lesson, limestone, math, mathematical, mineral, pastel, pile, powder, rock, school, sedimentary, sidewalk, sketch, smudge, student, study, teacher, white