Disappointed indian man admonishing friend over debacle, isolated over studio background. Upset person in disagreement with mate, pointing
Female professor lecturing students on psychology topic with help of modern technology such as display and remote controller
Disappointed indian man admonishing friend over debacle, isolated over studio background. Upset person in disagreement with mate, pointing
Close up back view of male teacher lecturing university students, shot on R3D
Defense of doctoral dissertation. The board members sit in the conference room. View of tribune from audience
Female teacher and students in university lecture theatre
Male teacher with university students in lecture theatre
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
Concerned mother addressing her upset child in the living room at home
African American vlogger woman recording a video on smartphone - content creation concept.
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
Teacher in the School
Angry man fighting with friend during videocall on tablet, isolated over studio background. Rude person in disagreement with mate, swearing
Angry man fighting with friend during videocall on tablet, isolated over studio background. Rude person in disagreement with mate, swearing
Angry female boss shouting at workers.
Female Indonesian martial arts teacher lecturing her students wearing traditional costumes
Teacher at lectern in lecture theatre presenting to students, shot on R3D
Vertical shot of female professor lecturing students on psychology topic with help of modern technology such as display and remote controller
Senior long-bearded man giving speech with microphone indoor. Serious old long-bearded businessman's lecturing, indoor windows background.
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
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 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
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.
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
adult man is conducting webinar, talking at web camera of laptop, blogger or specialist is lecturing from apartment
Elderly man with grandchild having communication. Grandfather with his granddaughter talking in park, summer nature background.
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.
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
Slow motion focus on a father and son playing together as the little boy walks away with a toy.
Student solves chemistry problem with teacher's help in a classroom
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
old teacher is lecturing online, staying home and communicating with pupils by internet
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