Επικεντρωμένη αρσενικό δάσκαλο στην επίσημη ένδυση βλέπουν φωτογραφική μηχανή και κρατώντας ξύλινα δείκτη μπροστά Μαυροπίνακας με εξισώσεις - Φωτογραφίες & Εικόνες Αρχείου

Smiling male teacher in formal wear holding wooden pointer in front of chalkboard with equations

Handsome male teacher in formal wear holding wooden pointer and explaining equations in class

Serious male teacher in formal wear holding wooden pointer in front of chalkboard with equations

Teacher standing at the blackboard and showing formulas.

Students in a classroom - handsome student solving a math problem on a blackboard during math class

Crumpled paper balls flying at male teacher with arms crossed in classroom with chalkboard on background

Portrait of male teacher near blackboard in classroom

Beautiful female teacher with wooden pointer explaining mathematical equations in classroom

Smiling female teacher with wooden pointer explaining mathematical equations in classroom

Female teacher in formal wear holding glasses and looking away in classroom

Female teacher pointing with finger at mathematical equation on chalkboard in class

Female teacher looking at camera and pointing with finger at mathematical equation on chalkboard in class

Attractive female teacher with wooden pointer explaining mathematical equations in classroom

Crumpled paper balls flying at female teacher in classroom with chalkboard on background

Smiling female teacher with wooden pointer explaining mathematical equations in classroom