Close-up portrait of a young man engaged in an intense conversation.
Back view of male teacher lecturing university students, shot on R3D
Female professor lecturing students on psychology topic with help of modern technology such as display and remote controller
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Angry african american man fighting with friend over debacle, isolated over studio background. Rude person in disagreement with mate
Teacher using an AV screen in a university classroom, shot on R3D
Male teacher with university students in lecture theatre
Female teacher and students in university lecture theatre
Close up back view of male teacher lecturing university students, shot on R3D
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Female Indonesian martial arts teacher lecturing her students wearing traditional costumes
Close up of female teacher lecturing university students, shot on R3D
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.
Teacher at lectern in lecture theatre presenting to students, shot on R3D
Portrait of korean male doctor lecturing for his multiracial doctors-partners about combination different chemical compounds in solving problems of medicine
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Young Indonesian actor in traditional costume with sward in her hand - martial arts teacher lecturing her students with a stern expression
Concerned mother addressing her upset child in the living room at home
Angry boss talking with employees.
Angry female boss shouting at workers.
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
Elderly man with grandchild having communication. Grandfather with his granddaughter talking in park, summer nature background.
Defense of doctoral dissertation. The board members sit in the conference room. View of tribune from audience
Man in his 40s giving a lecture on organic chemistry pointing to a formula on a blackboard in a high school or college classroom
Young Businessman Giving a Presentation - Green Screen Isolated
Concerned mother addressing misbehaving child on the sofa in a domestic setting
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.
Couple having a heated argument at home during a difficult time
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
Teacher in lecture theatre presenting to students, pan, shot on R3D
Close-up of focused mother discussing with her upset child in living room
Modern meeting room in company. RAW video record.
A distracted male and female student talking to each other during a chemistry lecture in a high school or college classroom
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.
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
woman professor of medicine is lecturing online, teaching students and sharing experience, advanced training
Close up of confident male professor sitting on couch and lecturing at home. Young Afro American man in glasses video conferencing, teaching
old teacher is lecturing online, staying home and communicating with pupils by internet
Teacher at lectern and students in lecture theatre, close up
A diverse group of employees express their frustration with their boss at a corporate meeting in an office space
Students Engaging in Classroom Discussion with Teacher
Male science chemistry teacher calling on a female student to answer questions in a classroom at a college or university study group
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, rack focus, shot on R3D
woman professor of medicine is lecturing online, teaching students and sharing experience, advanced training
Woman drinking coffee in college classroom during chemistry lecture with professor and student participation