Lächelnder Lehrer mit Kreide, der wie eine Kreidetafel mit Gleichung aussieht - Stockfoto & -bild

Smiling teacher pointing with hand near chalkboard during mathematic lesson

Brunette teacher with book and chalk smiling near equation on chalkboard

Smiling teacher with chalk standing near chalkboard during lesson

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

Cheerful teacher with chalk writing mathematic equation on chalkboard

Smiling teacher pointing with finger near chalkboard with mathematic formula

Teacher looking at book near mathematic equation on chalkboard

Positive teacher pointing with finger during mathematic lesson in school