Koulupoika käsi kirjoittaa liitu liitutaulu aikana oppitunnin koulussa . - Kuvapankin valokuva ja kuva

Closeup image of professor mans hand holding pen while explaining new material to students or pupils in university or colleage in studio.

Female hand writing on blackboard with chalk, close up

Rear view of a student or teacher with long brunette hair writing on a blank green blackboard or chalkboard with copyspace.

Schoolboy hand writes in chalk on a blackboard during a lesson at school.

Teenager girl with red hair washes off the board in class during the lessonteenager's hand erases from a school board during a lesson at school

Hand of a teenage girl writes with a ballpoint pen in a terad during a lesson at school

A schoolgirl at the blackboard was able to find a solution to the problem. inspiration. the idea came

Schoolgirl solves a math problem on the blackboard during the lesson.

A schoolgirl at the blackboard was able to find a solution to the problem. inspiration. the idea came

Portrait of a schoolgirl thinking about solving a problem on the blackboard during the lesson.

Hand of a teenage girl writes with a ballpoint pen in a terad during a lesson at school

Schoolboy hand writes in chalk on a blackboard during a lesson at school.