Jonge leraar en schoolbord met mat schrijven - Stockfoto’s en -afbeeldingen

Student and blackboard background

Handsome young school boy thinking about complex mathematical signs

Handsome young school boy thinking about complex mathematical signs

Handsome young school boy thinking about complex mathematical signs

Portrait of a blond businessman wearing a suit and pulling out his hair in panic. A rear view. A blackboard background with formulas written on it

Young businessman drawing business scheme on a wall

Back view of man engineer drawing formulas on blackboard

Calculations on the board

Portrait of caucasian senior teacher

Portrait of caucasian senior teacher

Portrait of caucasian teacher and blackboard

Portrait of man and blackboard background

Caucasian teacher and class background

Portrait of caucasian senior teacher

Portrait of young teacher at work

Young caucasian teacher portrait with blackboard background