Close up back view of male teacher lecturing university students, shot on R3D
Male teacher with university students in lecture theatre
Female professor lecturing students on psychology topic with help of modern technology such as display and remote controller
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Angry man fighting with friend over debacle, putting blame on him, isolated over studio background. Rude person in disagreement with mate
Teacher addressing students in a university lecture theatre
Female teacher and students in university lecture theatre
Angry african american man fighting with friend over debacle, isolated over studio background. Rude person in disagreement with mate
Portrait of Young Female Teacher in Classroom Using Laptop to Give Remote Classes In Front of a Blackboard with Formulas. Science Professor Teaching Online, Having a Video Conference with Students
Close-up portrait of a young man engaged in an intense conversation.
Portrait of korean male doctor lecturing for his multiracial doctors-partners about combination different chemical compounds in solving problems of medicine
African American vlogger woman recording a video on smartphone - content creation concept.
Defense of doctoral dissertation. The board members sit in the conference room. View of tribune from audience
Disappointed indian man admonishing friend over debacle, isolated over studio background. Upset person in disagreement with mate, pointing
Concerned mother addressing her upset child in the living room at home
Young Indonesian actor in traditional costume with sward in her hand - martial arts teacher lecturing her students with a stern expression, royal commander trains her troops to learn self-defense
Close up of female teacher lecturing university students, shot on R3D
Teacher at lectern in lecture theatre presenting to students, shot on R3D
Teacher at lectern listening to students in lecture theatre
Angry female boss shouting at workers.
Man in his 40s giving a lecture on organic chemistry pointing to a formula on a blackboard in a high school or college classroom
adult man is conducting webinar, talking at web camera of laptop, blogger or specialist is lecturing from apartment
Angry man fighting with friend during videocall on tablet, isolated over studio background. Rude person in disagreement with mate, swearing
Students in university lecture seen over teacher?s shoulder, shot on R3D
Angry man fighting with friend during videocall on tablet, isolated over studio background. Rude person in disagreement with mate, swearing
Male teacher in lecture theatre presenting to students
Young Businessman Giving a Presentation - Green Screen Isolated
Female science professor in lab coat recording lesson with camera while explaining educational material to students at desk in front of blackboard with formulas and equations in university classroom.
Young doctor explaining chemical compounds on hospital poster
Misbehaving African American adolescent girl grimacing saying bla-bla as unrecognizable man gesturing at background. Unknown angry father scolding bored daughter at home. Adolescence and education.
Young Man Drawing Diagram on Flipchart
Teacher at lectern and students in lecture theatre, close up
Young Indonesian actor in traditional costume with sward in her hand - martial arts teacher lecturing her students with a stern expression
Female Indonesian martial arts teacher lecturing her students wearing traditional costumes
Male student raising his hand to answer a question from his teacher in a high school or college classroom
Defense of doctoral dissertation. The board members sit in the conference room.
Young Indonesian actor in traditional costume with sward in her hand - martial arts teacher lecturing her students with a stern expression
A young professor explaining and demonstrating with a green screen...
Senior long-bearded man giving speech with microphone indoor. Serious old long-bearded businessman's lecturing, indoor windows background.
Angry boss talking with employees.
Close-up of focused mother discussing with her upset child in living room
Close up of confident male professor sitting on couch and lecturing at home. Young Afro American man in glasses video conferencing, teaching
Defense of doctoral dissertation. The board members sit in the conference room. The tribune is visible. Slow motion.
old teacher is lecturing online, staying home and communicating with pupils by internet
Young Indonesian actor in traditional costume with sward in her hand - martial arts teacher lecturing her students with a stern expression, royal commander trains her troops to learn self-defense
Young Indonesian actor in traditional costume with sward in her hand - martial arts teacher lecturing her students with a stern expression, royal commander trains her troops to learn self-defense
Young Indonesian actor in traditional costume with sward in her hand - martial arts teacher lecturing her students with a stern expression, royal commander trains her troops to learn self-defense
A diverse group of employees express their frustration with their boss at a corporate meeting in an office space
Woman professor sitting at table and lecturing online at class. Female English teacher in glasses speaking on tabletPC camera. Education concept. Quarantine concept. Study by internet.