Uśmiechnięty nauczyciel w białej sierści i okulary ochronne obejmując uczniów podczas lekcji chemii - Zdjęcie stockowe & obraz

Smiling teacher in white coat and protective goggles embracing pupils during chemistry lesson

Smiling teacher in white coat and protective goggles embracing pupils during chemistry lesson

Happy adult scientists and little girl student working together in chemical lab and smiling at camera

Smiling teacher and student scientists working with molecular model and taking notes

Teacher and pupils at chemistry lesson in classroom

Education, science, chemistry and children concept - kids or students with test tube making experiment at school laboratory

Education, science, chemistry and children concept - kids or students with test tube making experiment at school laboratory

Smiling schoolgirl holding beaker and looking at camera during chemistry lesson

Smiling schoolgirl holding beaker and doing chemical experiment during chemistry lesson

Schoolboys with backpacks looking at camera near blackboard with educational icons

Dentists checking patient teeth in modern clinic

Cropped shot of mother and daughter learning numbers on chalkboard

Schoolchildren holding wooden cubes with word math near blackboard with mathematics symbols

Optician holding lenses for trial frame while colleague examining kid with visual field test

Handsome young dentist showing tablet to female client