ID 175428390 © Loren581 | Megapixl.com
Sharing is not just caring, it's also about giving credit - add this image to your page and give credit to the talented photographer who captured it.:
background black blackboard chalk circle circumference classes constant day decimal definition digit dust dusty education engineering exam formula handwriting handwritten homework horizontal intelligence learning lesson march mathematical mathematics nobody number physics point professor representation rough school science smudge student symbol teacher text texture training truncated white