Lächelnder Lehrer in weißem Mantel und Schutzbrille umarmt Schüler im Chemieunterricht - Stockfoto & -bild

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

Little boy and girl in white coats using microscope and smiling at camera in lab

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

Teacher and pupils at chemistry lesson in classroom

Pupils in protective goggles holding beakers during chemistry lesson

Pupils holding molecule structures while sitting in classroom during chemistry lesson

Pupils holding molecule structures while sitting in classroom during chemistry lesson

Schoolboys with backpacks looking at camera near blackboard with educational icons

Cheerful smiling schoolgirl sitting at desk and looking at camera in classroom

Dentists checking patient teeth in modern clinic

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

Doctor waiting for female patient suffering from toothache in modern dental clinic