![](http://www.alamy.com/thumbs/6/87C76222-0BBD-4B8F-8E47-67FE67ABB811/CY55D8.jpg)
closeup image of classic blackboard with math text
Size: 5000px × 3333px
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