Szczęśliwy, starszy wykładowca z otwartymi ramionami stojąc w pobliżu tablica - Zdjęcie stockowe & obraz

Happy senior lecturer holding paper plane in hand

Smiling grey hair professor holding stack of books with apple on top

Smiling grey hair professor holding piece of chalk

Grey hair professor looking at students rising hands

Grey hair professor pointing on something with wooden pointer

Happy senior lecturer buttoning shirt

Pensive grey hair professor standing at blackboard with piece of chalk

Smiling grey hair professor sitting on table with laptop

Smiling elderly man in eyeglasses and bow tie looking at camera isolated on grey

Excited senior man in headphones waving hand at smartphone on chair on grey background

Senior man smiling at camera while showing thumb up gesture and holding blue jacket isolated on grey

Cheerful senior man showing yeah gesture isolated on grey

Positive senior man talking on smartphone and pointing with finger isolated on grey

Positive senior man in blue jacket and bow tie touching eyeglasses isolated on grey

Handsome grey hair man taking selfie with smartphone in kitchen

Confused senior man showing dubium gesture while looking at camera isolated on grey

Portrait of smiling grey hair man looking at camera at home