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
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
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
Medium long of male chemistry teacher in medical gown and protective goggles standing in front of high school students in morning, holding beaker with liquid
Chemistry teacher demonstrates litmus test to young student in lab
Asian science teacher with goggles looks at girl student doing experiment with liquids at chemistry lesson in classroom extreme closeup
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
Group of people in medical gowns and protective suits conducting experiments
Excited multiracial high school students with mixed race female teacher doing chemical experiment during lesson. Curious diverse classmates in protective glasses studying chemistry looking at reaction
Group of people with female in front in medical gowns and protective suits conducting experiments