Slow motion of students in face masks sitting at desks in classroom, raising hands
Student asking question in college classroom
Tracking right medium long of diverse teenage students sitting at desks in classroom at lesson, using laptop computers, raising hands and answering questions
Moving quantum robot appearing in bright classroom raising artificial hand greeting students sitting at desks
Video of back of biracial boy sitting at desk in classroom and raising hand
Diverse happy schoolchildren sitting at desk and raising hands in school classroom
Diverse happy schoolchildren sitting at desk and raising hands in school classroom
High school or college female student sitting by the desk raising her arm and answer.
Selective focus on unrecognizable elementary age girl sitting at desk raising hand to answer teacher question in classroom at daytime
Focus on elementary age boy sitting at desk in classroom listening to teacher and raising hand to give answer in school at daytime
Group of ethnically diverse college students sitting at desks in lecture hall raising their hands to ask or answer question