Frustrated senior teacher standing in front of a chalk board.

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Size: 6312px × 4732px
Location: Hamburg, Germany
Photo credit: © Frank Harms / Alamy / Afripics
License: Royalty Free
Model Released: Yes

Keywords: 60s, academic, adult, age, blackboard, board, caucasian, chalk, chemistry, class, classroom, college, education, educational, educator, elderly, emotion, explaining, expression, faculty, formula, frustrated, graduate, instructor, intelligent, learn, lecture, lecturing, male, man, mature, person, portrait, professor, school, senior, teacher, teaching, university, wisdom