Muotokuva omistettu Matematiikan opettaja selittää teorian vastaan Greenboard aikana luokan nykyaikaisessa koulussa tai yliopistossa - Kuvapankin valokuva ja kuva

Portrait of a math middle-aged teacher smiling while looking at camera against greenboard in the classroom

Maths teacher standing in front of a blackboard with equations holding a tablet and looking to the side with a serious expectant expression

Male teacher writing a mathematical equation on a blackboard in a classroom while holding a tablet-pc

Relaxed confident male teacher standing leaning against a blank green chalkboard in the classroom with folded arms

Bearded young male teacher writing on a blank chalkboard in a classroom in a close up profile view

Male teacher or professor writing on a blank green chalkboard in a classroom, close up profile head and shoulders portrait

Male teacher taking a question from the class as he stands in front of a blank chalk board extending his hand

Male teacher taking question in class pointing with his pen with look of concentration

Happy satisfied male teacher standing with his hands behind his back and a pleased smile against a blank green blackboard

Thoughtful male teacher leaning on a chalkboard

Businessman or teacher standing thinking in front of a blackboard with chalk in his hands as he stares pensively into the air

Middle-aged male teacher writing on a blank chalkboard while holding a tablet computer in his hand

Male teacher taking question in class pointing with his pen with look of concentration

Attractive male teacher or lecturer standing with folded arms looking up at a blank chalk board with copy space with a quiet smile

Male teacher taking a question from the class