![](http://www.alamy.com/thumbs/6/B3422AFD-3B34-4999-95A9-F9E9304B5ED1/2C4PE55.jpg)
Tally marks in chalk on dirty blackboard, conceptual image
Size: 8256px × 5504px
Photo credit: © Igor Stevanovic / Alamy / Afripics
License: Royalty Free
Model Released: No
Keywords: blackboard, chalk, chalkboard, counting, education, hash, learn, mark, marks, numeral, school, tally, tallying