Female professor lecturing students on psychology topic with help of modern technology such as display and remote controller
Close up back view of male teacher lecturing university students, shot on R3D
Male teacher with university students in lecture theatre
Female teacher and students in university lecture theatre
Defense of doctoral dissertation. The board members sit in the conference room. View of tribune from audience
Angry african american man fighting with friend over debacle, isolated over studio background. Rude person in disagreement with mate
Female teacher and students in university lecture theatre
African American vlogger woman recording a video on smartphone - content creation concept.
Portrait of korean male doctor lecturing for his multiracial doctors-partners about combination different chemical compounds in solving problems of medicine
Disappointed indian man admonishing friend over debacle, isolated over studio background. Upset person in disagreement with mate, pointing
Disappointed indian man admonishing friend over debacle, isolated over studio background. Upset person in disagreement with mate, pointing
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 student with a stern expression, female warrior pushing opponent to the ground
Concerned mother addressing her upset child in the living room at home
Angry man fighting with friend during videocall on tablet, isolated over studio background. Rude person in disagreement with mate, swearing
Teacher in the School
Angry female boss shouting at workers.
Teacher at lectern in lecture theatre presenting to students, shot on R3D
Female Indonesian martial arts teacher lecturing her students wearing traditional costumes
Vertical shot of female professor lecturing students on psychology topic with help of modern technology such as display and remote controller
Close up of female teacher lecturing university students, shot on R3D
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
Young Doctor Illustrating Tree on Flipchart
Senior long-bearded man giving speech with microphone indoor. Serious old long-bearded businessman's lecturing, indoor windows background.
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
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
Students in university lecture seen over teacher?s shoulder, shot on R3D
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.
Man in his 40s giving a lecture on organic chemistry pointing to a formula on a blackboard in a high school or college classroom
Male teacher in lecture theatre presenting to students
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
Teacher at lectern and students in lecture theatre, close up
Teacher in lecture theatre presenting to students, pan, shot on R3D
Close up of confident male professor sitting on couch and lecturing at home. Young Afro American man in glasses video conferencing, teaching
Young Businessman Giving a Presentation - Green Screen Isolated
Elderly man with grandchild having communication. Grandfather with his granddaughter talking in park, summer nature background.
Slow motion focus on a father and son playing together as the little boy walks away with a toy.
Female boss disappointed in her workers.
Young doctor explaining chemical compounds on hospital poster
Male student raising his hand to answer a question from his teacher in a high school or college classroom
Angry boss talking with employees.
Defense of doctoral dissertation. The board members sit in the conference room.
female professor of medicine is lecturing online from her office , using laptop with internet connection
Skilled woman teaching online with laptop and headphones, supported by husband. Expert consultant conducting video meeting at home.