Over-shoulder of male chemistry teacher in medical gown and protective goggles standing in front of high school students in morning, making experiment with chemicals
Over-shoulder of male chemistry teacher in medical gown and protective goggles standing in front of high school students in morning, mixing transparent and violet chemical liquids
Side view of male chemistry teacher in medical gown and protective goggles standing in front of high school students in morning, making experiment with chemicals
Medium long of male teacher in medical gown and protective goggles standing in foreground of blackboard, showing experiment on chemistry lesson
Long shot of male teacher in medical gown and protective goggles standing in front of high school students who sitting at desks on chemistry lesson
Low angle of Caucasian male teacher in medical gown and protective goggles standing in foreground of blackboard, shaking beaker on chemistry lesson
Science engineer using computer to work on chemistry experiment in laboratory, wearing protective goggles and white coat. Lab worker working on innovation and development with equipment.
Elementary students looking to teacher, over shoulder view
Elementary students looking to teacher, over shoulder view
Chemistry teacher guides students in chemical reaction experiments
Teacher using tablet in school class, over shoulder view
Chemistry teacher demonstrates litmus test to young student in lab