Ritratto di profilo di un giovane con un microfono che parla con un gruppo di persone in una sala conferenze offuscata - Foto e immagini stock

Over the shoulder shot of a teacher and his students listening to him

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

Close up of lecturer with microphone talking to group of students

Focused lecturer is standing in aula with microphone in his hands

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

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

Close-up of professor and students at the university

Close up of man taking part in discussion panel

Businesswoman is explaining her idea at the conference

Woman back view raising hand during conference in lecture hall

Close up of attentive listener during scientists convention

Casually-dressed manager leading a meeting for other staff members

Mature politician and his election team during press conference

Young man is not interested about conference

Young man is taking notes during conference