El profesor principal explica la lección, hablando con los estudiantes acerca de la física y la escritura en pizarra. Profesor de pelo gris de la Universidad dando una conferencia en clase de ciencias . - Metraje y vídeo de stock

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

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

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.

Girl cleaning blackboard in classroom. Breda, Noord-Brabant, Netherlands

Side view close up of a young African schoolboy standing at the front of the class writing an answer to a math question on the blackboard and then walking away during a lesson in a township elementary school classroom 4k