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
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
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
Low angle side-view of curly Biracial guy in white gown, goggles and glove sitting at desk in laboratory, mixing liquid chemicals with dropper in beaker at daytime
Hand holding beaker with liquid. Flask with purple fluid. Make a contribution to science. Revolution in chemistry.
Elementary School Science Classroom: Teacher Explains Chemistry to Diverse Group of Children, Child Mixes Chemicals in Beakers. Children Learn with Interest
Elementary School Science Classroom: Teacher Explains Chemistry to Diverse Group of Children, Child Mixes Chemicals in Beakers. Children Learn with Interest
Elementary School Science Classroom: Teacher Explains Chemistry to Diverse Group of Children, Child Mixes Chemicals in Beakers. Children Learn with Interest