ID 61577757 © Matriyoshka | 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.:
back background blackboard book books bulb campus classroom concept development education educational educator examinations flat ideas illustration institute international knowledge lamp learn lecturer lessons map online open people professor research school science scientific smile student study teacher teaching theory thinking training university vector world youth