Fiducioso anziano insegnante di sesso maschile in piedi con le braccia incrociate di fronte a una lavagna verde vuota in classe - Foto e immagini stock

Horizontal portrait of a Caucasian senior male teacher smiling at camera with a blank chalkboard in the background

Thoughtful senior man daydreaming looking up into the air with a smile as he stands against a blank green chalkboard with copyspace

Confident senior man with folded arms standing against a green blackboard smiling at the camera

Portrait of senior man with glasses - serious

Confident grey-haired balding senior man with a friendly smile standing against a dark grey background with copyspace and slight vignetting

Studio shot of a smiling business man with crossed arms on the dark background

Portrait of confident businessman with arms crossed standing against gray wall

Grinning bearded teacher in front of chalkboard while holding eyeglasses

Close-up portrait of a mature balding man smiling wearing casual clothing and glasses, with a friendly expression in front of a gray wall

Side view portrait of confident male doctor standing with arms crossed

Confident businessman with arms crossed leaning on wall

Middle-aged male teacher standing with his arms folded against the blackboard in chemistry class with scientific glassware on the table in front of him

Elderly man in glasses standing thinking with his hand to his chin and a happy smile as he recalls fond memories

Portrait of confident male professor with arms crossed standing against chalkboard in classroom

Portrait of a mature balding man with a friendly smile, wearing a casual clothing, in front of a gray wall

Portrait of businessman holding digital tablet while sitting on grass at park

Mature businessman reading book while standing against shutter