stressed teacher and blackboard background

---

Size: 4000px × 4000px
Photo credit: © gualtiero boffi / Alamy / Afripics
License: Royalty Free
Model Released: Yes

Keywords: adult, anxious, blackboard, brain, business, businessman, caucasian, concentration, depression, emotional, exhaustion, expression, face, failure, frustration, head, headache, idea, intelligence, male, man, math, mind, pain, pensive, person, problems, sadness, solution, stress, stressful, student, studio, teacher, thinking, tired, touching, uncertainty, white, worries