Medium long of male teacher in medical gown and protective goggles standing in foreground of blackboard, showing experiment on chemistry lesson
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
Scientist shaking green fluid in beaker
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
Young students conduct fascinating chemistry experiment with guidance from diverse teacher in studio
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Chemistry beakers, bottles and flasks with colorful liquids in an old pharmacy
Over-shoulder of male chemistry teacher in medical gown and protective goggles standing in front of high school students in morning, showing experiment
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
Low angle of curly Biracial guy in white gown, goggles and glove sitting at desk in laboratory, mixing liquid chemicals with dropper in beaker at daytime
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