Πάνω από τον ώμο πυροβολισμό ένα δάσκαλο και τους μαθητές του, ακούγοντας τον - Φωτογραφίες & Εικόνες Αρχείου

Close up of lecturer with microphone talking to group of students

Close-up of a smiling teacher with a microphone, talking to a group of students in a lecture hall

Portrait in profile of a young man with a microphone talking to a group of people in a blurred lecture room

Speaker is giving a speech while the whole audience is listening to him

Close-up of professor and students at the university

Smiling young academic teacher seen from the back, giving a lecture to a group of students in blurry background

Close up of lecturer with microphone, talking to group of students

Speaker during presentation is looking at his notes

Focused lecturer is standing in aula with microphone in his hands

Shot of a teacher giving a lecture

Shot of a teacher and his students in a classroom

Close up of man taking part in discussion panel

Shot of a lecturer explaining new topic to the students

Woman back view raising hand during conference in lecture hall

Close up of attentive listener during scientists convention

Businesswoman is explaining her idea at the conference

Shot of a smiling teacher speaking to the microphone in a lecture hall