ID 159746591 © Elnur | Megapixl.com
Model Released
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.:
academic algebra blackboard board books chalkboard class classroom college discussing education equation exam exhausted explaining formula formulas green knowledge learning lecture lecturer lesson making math mathematical mathematician mathematics notes physicist physics reading school science scientific solution stressed student study studying taking teacher teaching test textbooks tired unhappy university woman writing