Vista ad alto angolo di anziano uomo dalla testa grigia, professore, insegnante a lezione, lezione in classe, al chiuso. Concetto di professione, lavoro, istruzione e motivazione. Ritorno a scuola, università - Foto e immagini stock

High angle view of elderly gray-headed man, professor, teacher at lecture, lesson at classroom, indoors. Concept of professional occupation, job, education and motivation. Back to school, university

High angle view of elderly gray-headed man, professor, teacher at lecture, lesson at classroom, indoors. Concept of professional occupation, job, education and motivation. Back to school, university

Preparation for the lecture. Elder gray-headed man, professor, teacher working at work, indoors. Concept of professional occupation, job, education and motivation. Back to school, university

Serious mature business man in white shirt reading contract while standing in the office

Elderly man teacher on a blank chalkboard during lesson, teaching class at college

Senior lecturer writing something on blackboard and showing one finger up

Grey hair professor talking by smartphone and looking at camera

Male architect-engineer presents project of future house for young family. Man working in the office with documents, blueprint. First home, industrial, building concept. Moving to new live place.

Nervous and tired boss at his workplace busy while people moving near blurred. Office worker, manager working, has problems and deadline, his colleagues distracting. Business, work, workload concept.

Senior man working with tablet at home - concept of home studying. Caucasian male model sitting on sofa and doing his homework serfing in internet, watching cinema or webinar, online lessons.

Senior man working with tablet at home - concept of home studying. Caucasian male model lying on sofa and making notes while serfing in internet, watching cinema or webinar, online lessons.

Senior man working with laptop at home - concept of home studying. Caucasian male model sitting on sofa and doing his homework or serfing in internet, watching cinema, playing games, typing text.

Nervous and tired boss at his workplace busy while people moving near blurred. Office worker, manager working, has problems and deadline, his colleagues distracting. Business, work, workload concept.

Senior man working with laptop at home - concept of home studying. Caucasian male model sitting on sofa and preparing to do his homework or serfing in internet, watching cinema, playing games.

Portrait of senior bearded man raising glasses and looking on tablet screen with attention against yellow studio background. Concept of human emotions, lifestyle, male fashion, style, business, sales