Female professor lecturing students on psychology topic with help of modern technology such as display and remote controller
Back view of male teacher lecturing university students, shot on R3D
Close up back view of male teacher lecturing university students, shot on R3D
Male teacher with university students in lecture theatre
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
Female teacher and students in university lecture theatre
Disappointed indian man admonishing friend over debacle, isolated over studio background. Upset person in disagreement with mate, pointing
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 african american man admonishing friend over debacle, isolated over studio background. Upset BIPOC person in disagreement with
Concerned mother addressing her upset child in the living room at home
Disappointed indian man admonishing friend over debacle, isolated over studio background. Upset person in disagreement with mate, pointing
Angry man fighting with friend during videocall on tablet, isolated over studio background. Rude person in disagreement with mate, swearing
Young Indonesian actor in traditional costume with sward in her hand - martial arts teacher lecturing her student with a stern expression, female warrior pushing opponent to the ground
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Disappointed man admonishing friend over debacle, isolated over blue studio background. Upset person in disagreement with mate, pointing
Portrait of korean male doctor lecturing for his multiracial doctors-partners about combination different chemical compounds in solving problems of medicine
Angry female boss shouting at workers.
Female Indonesian martial arts teacher lecturing her students wearing traditional costumes
Man in his 40s giving a lecture on organic chemistry pointing to a formula on a blackboard in a high school or college classroom
Close up of female teacher lecturing university students, shot on R3D
Teacher at lectern in lecture theatre presenting to students, shot on R3D
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.
adult man is conducting webinar, talking at web camera of laptop, blogger or specialist is lecturing from apartment
Young Doctor Illustrating Tree on Flipchart
Students in university lecture seen over teacher?s shoulder, shot on R3D
Male teacher in lecture theatre presenting to students
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
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
Senior long-bearded man giving speech with microphone indoor. Serious old long-bearded businessman's lecturing, indoor windows background.
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 Businessman Giving a Presentation - Green Screen Isolated
Teacher in lecture theatre presenting to students, pan, shot on R3D
Male student raising his hand to answer a question from his teacher in a high school or college classroom
Teacher at lectern and students in lecture theatre, close up
Defense of doctoral dissertation. The board members sit in the conference room. The tribune is visible. Slow motion.
Student solves chemistry problem with teacher's help in a classroom
old teacher is lecturing online, staying home and communicating with pupils by internet
Young doctor explaining chemical compounds on hospital poster
Young Indonesian actor in traditional costume with sward in her hand - martial arts teacher lecturing her students with a stern expression
Close up of confident male professor sitting on couch and lecturing at home. Young Afro American man in glasses video conferencing, teaching
Skilled woman teaching online with laptop and headphones, supported by husband. Expert consultant conducting video meeting at home.
Female boss disappointed in her workers.
Defense of doctoral dissertation. The board members sit in the conference room.
Close-up of focused mother discussing with her upset child in living room
Angry boss talking with employees.
medical expert is lecturing online about modern advances and innovation for health professional, female therapist is listening