Low angle of Caucasian male teacher in medical gown and protective goggles standing in foreground of blackboard, shaking beaker on chemistry lesson
Over-shoulder of male chemistry teacher in medical gown and protective goggles standing in front of high school students in morning, showing experiment
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
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
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
Chemistry teacher demonstrates litmus test to young student in lab
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
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.
Joyful child with protective goggles drips colored liquid carefully with diverse teachers at science lesson
Young girl in lab goggles conducting chemistry experiments. Future scientist explores research and elements. Close-up.
Front view of on lesson of chemistry group of schoolchildren with Asian teacher doing a chemical experiment using chemical liquids and dry ice in laboratory class
Chemistry teacher guides students in chemical reaction experiments