Usmívající se učitel ukazující prsty na tabuli s matematickými vzorci a digitálním fotoaparátem ve třídě - Stock fotografie a obrázky

Teacher talking near blurred digital camera and chalkboard with math formulas in classroom

Teacher pointing at math formulas on chalkboard and holding laptop during online lesson in classroom

Teacher in eyeglasses explaining math formulas on chalkboard near digital camera in class

Tutor pointing at chalkboard and holding digital tablet near camera in school

Teacher talking and holding laptop during online lecture near chalkboard in classroom

Teacher in eyeglasses talking near blurred digital camera and chalkboard

Teacher holding laptop during online lesson near chalkboard with math formulas in class

Smiling teacher looking away and pointing with finger near chalkboard

Shocked geometry teacher touching face and pointing with finger at chalkboard with illustration

Shocked teacher touching face and pointing with finger near chalkboard

Brunette doctor in white coat writing chemical formulas on glass board in lab

Cheerful pregnant businesswoman gesturing near laptop in office

Pensive businesswoman standing near devices and notebook on blurred foreground in office

Excited businessman holding notebook and recording voice message on smartphone in office

Low angle view of blurred chemist holding clipboard and felt pen near chemical formulas on glass board