Średnim wieku mężczyzna nauczyciel pisania na tablicy pusty trzymając komputer typu tablet w ręku - Zdjęcie stockowe & obraz

Male teacher taking a question from the class as he stands in front of a blank chalk board extending his hand

Confident smart male teacher or professor standing in front of a blank chalkboard in a classroom clutching a folder of notes to his chest

Male teacher writing on a blank chalkboard while holding class notes in his hand in a close up side view

Attractive male teacher or lecturer standing with folded arms looking up at a blank chalk board with copy space with a quiet smile

Portrait of a dedicated middle-aged teacher holding a blue folder while looking at camera in the classroom of a modern school or university

Thoughtful teacher seeking a way to explain things to his pupils standing at the chalkboard looking pensively into the air

Cheerful school teacher in classroom at blackboard.

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

Relaxed confident male teacher standing leaning against a blank green chalkboard in the classroom with folded arms

Thoughtful male teacher looking at a blank empty green blackboard with a stick of chalk in his hand and copy space for your text

Male teacher taking a question from the class

Portrait of young bearded teacher standing against blackboard in classroom

Bearded young male teacher writing on a blank chalkboard in a classroom in a close up profile view

Portrait of young bearded teacher standing against blackboard in classroom

Young man standing teaching at a blackboard in a classroom with the aid of a handheld tablet computer looking up at the camera with a distracted smile

Smiling teacher listening to a student as he turns back from the blackboard with a piece of chalk in his hand, blank green copy space