Teacher using an AV screen in a university classroom, shot on R3D
Female teacher and students in university lecture theatre
Female professor lecturing students on psychology topic with help of modern technology such as display and remote controller
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
Disappointed indian man admonishing friend over debacle, isolated over studio background. Upset person in disagreement with mate, pointing
Close-up portrait of a young man engaged in an intense conversation.
Close up back view of male teacher lecturing university students, 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.
Angry female boss shouting at workers.
Students in university lecture seen over teacher?s shoulder, shot on R3D
Teacher at lectern in lecture theatre presenting to students, shot on R3D
Disappointed indian man admonishing friend over debacle, isolated over studio background. Upset person in disagreement with mate, pointing
Close up of female teacher lecturing university students, shot on R3D
Male teacher in lecture theatre presenting to students
NEW
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
Concerned mother addressing her upset child in the living room at home
Portrait of korean male doctor lecturing for his multiracial doctors-partners about combination different chemical compounds in solving problems of medicine
Elderly man with grandchild having communication. Grandfather with his granddaughter talking in park, summer nature background.
Close-up of focused mother discussing with her upset child in living room
A diverse group of employees express their frustration with their boss at a corporate meeting in an office space
Young Businessman Giving a Presentation - Green Screen Isolated
aged professor of medicine is lecturing online from his office in clinic, medium portrait of doctor
Man in his 40s giving a lecture on organic chemistry pointing to a formula on a blackboard in a high school or college classroom
medical expert is lecturing online about modern advances and innovation for health professional, female therapist is listening
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.
Concerned mother addressing misbehaving child on the sofa in a domestic setting
Couple having a heated argument at home during a difficult time
adult man is conducting webinar, talking at web camera of laptop, blogger or specialist is lecturing from apartment
Teacher in lecture theatre presenting to students, pan, shot on R3D
Young Indonesian actor in traditional costume with sward in her hand - martial arts teacher lecturing her students with a stern expression
Teacher at lectern and students in lecture theatre, close up
Young doctor explaining chemical compounds on hospital poster
Angry boss talking with employees.
Modern meeting room in company. RAW video record.
Defense of doctoral dissertation. The board members sit in the conference room. The tribune is visible. Slow motion.
Students Engaging in Classroom Discussion with Teacher
Male student raising his hand to answer a question from his teacher in a high school or college classroom
Female boss disappointed in her workers.
aged man is watching online training sitting at home in front of laptop, woman is lecturing, man is writing notes
Respectable serious senior man giving speech with microphone. Portrait of an old aged grandfather in suit with long beard lecturing to audience in bright room.
Teacher in lecture theatre presenting to students, rack focus, 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
female doctor of medicine is lecturing online, male therapist is listening and writing, watching by laptop
A distracted male and female student talking to each other during a chemistry lecture in a high school or college classroom
Slow motion focus on a father and son playing together as the little boy walks away with a toy.