Starszy wykładowca wskazuje na coś w sala wykładowa - Zdjęcie stockowe & obraz

Senior lecturer holding piece of chalk and looking away

Senior lecturer leaning on table and looking away

Grey hair professor pointing on something at lecture hall

Happy senior lecturer buttoning shirt

Senior lecturer holding book and looking away

Smiling grey hair professor holding piece of chalk

Smiling grey hair professor holding wooden pointer

Grey hair professor pointing on something at blackboard

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

Elderly man in bow tie and blue jacket using smartphone isolated on grey

Excited senior man in bow tie and jacket holding smartphone isolated on grey

Serious senior man in tweed suit and glasses looking at camera

Excited senior man in bow tie pointing with fingers at camera isolated on grey

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

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

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