Učitel mluví v blízkosti rozmazané digitální fotoaparát a tabuli s matematickými vzorci ve třídě - Stock fotografie a obrázky

Teacher in eyeglasses talking near blurred digital camera and chalkboard

Teacher holding chalk near blurred digital camera and chalkboard in class

Teacher talking near digital camera and chalkboard with math formulas in class

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

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

Teacher having online lesson on laptop near math formulas on chalkboard

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

Positive teacher pointing at blurred chalkboard with math formulas near digital camera in school

Teacher with book and chalk pointing with finger during lesson in classroom

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

Smiling teacher looking away and pointing with finger near chalkboard

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

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

Blurred doctor with felt pen and clipboard writing chemical formulas on glass board

Shocked teacher touching face and pointing with finger near chalkboard

Low angle view of scientist with felt pen near blurred formulas on glass board

Afrcan american teacher pointing with hand while holding book near pupils in classroom