Profesor senior de pie entre la caída de pedazos arrugados de papel - Foto e imagen de stock

Smiling senior lecturer standing in classroom and looking at camera

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

Senior lecturer protecting himself of falling crumpled pieces of paper

Senior lecturer holding piece of chalk and looking away

Grey hair professor sitting on table in lecture room and holding book

Smiling grey hair professor holding piece of chalk

Grey hair professor pointing on something at blackboard

Senior lecturer leaning on table and looking away

Elderly man in shirt and jacket using smartphone isolated on grey

Handsome grey hair man sitting in armchair, holding old photos and looking away

Handsome grey hair man holding book and looking at camera at home

Smiling senior man in shirt and jacket pulling hand at camera on blurred foreground isolated on grey

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

Thoughtful senior man in jacket looking at camera isolated on grey

Collage of senior man smiling while talking on smartphone on grey background

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

Collage of pensive and excited senior man in shirt and jacket on grey background