Profesor, Man, chemik, biolog z bílého lékařského roucha, profesor ve skleničkách, muž s plnovousem a knírem, drží třídu, lekci u Tribune, učitelova stolu, muž gestikuluje, sundal brýle, odpálil ho, zelenou tabuli na - Stock záběry a video

Professor, Man, Chemist, Biologist in White Medical Robe, professor in glasses, man with beard and mustache, is Holding the Class, Lesson at the Teacher's Desk, man is gesticulating, green blackboard on the wall is behind the teacher, Walking toward

Close up on teacher as she hands out assignments in a high school classroom. When she turns her back, camera zooms out to reveal one girl at the back of the class passing a note to her friend.

Senior teacher explains lesson, talking with students about physics and writing on blackboard. University gray haired professor giving lecture in science class.

MS TU Man reading at desk, looking at camera, smiling

Professor, Man, Chemist, Biologist in White Medical Robe, professor in glasses, man with beard and mustache, is Holding the Class, Lesson at the Teacher's Desk, man is gesticulating, green blackboard on the wall is behind the teacher, Walking toward

Professor, Man, Chemist, Biologist in White Medical Robe, professor in glasses, man with beard and mustache, is Holding the Class, Lesson at the Tribune, Teacher's Desk, man is gesticulating, turning back, green blackboard on the wall is behind the

Professor, Chemist, Biologist, Teacher is Holding the Class,Having Speech, Slap His Palm on the Tribune, water tap, sink, professor in white medical robe, in glasses, daytime, green blackboard, indoor, light from the windows, door is behind the

Professor, Man, Chemist, Biologist in White Medical Robe, professor in glasses, man with beard and mustache, is Holding the Class, Lesson at the Tribune, Teacher's Desk, took the glasses off, talking, gesticulating, turning back, green blackboard on

Man Clicks The Screen, Standing with His Back to Camera, Put a Tablet Away, Turns and Goes Away, Businessman is holding virtual futuristic tablet, looking at the screen, doing an internet store shopping with credit card, working on a forex exchange,

Man Clicks the Tablet, Screen to a Camera, Man Turns and Smiling to Someone, Talking, Replies to Someone, Businessman is Holding Virtual Futuristic Tablet, Looking at the Screen, Doing an Internet Store Shopping, Working on a Forex Exchange,