![](http://www.alamy.com/thumbs/6/A0E10E95-5FA3-404A-9EF9-54624005181B/CY5F8M.jpg)
closeup image of classic blackboard with math text
Size: 4912px × 3564px
Photo credit: © gualtiero boffi / Alamy / Afripics
License: Royalty Free
Model Released: No
Keywords: background, blackboard, chalkboard, closeup, dark, educa, education, educational, improve, math, school, teach, white