Old experienced teacher in the classroom

---

Size: 5992px × 4000px
Photo credit: © Elnur Amikishiyev / Alamy / Afripics
License: Royalty Free
Model Released: No

Keywords: academic, aged, amplifier, announcement, announcing, attack, bullhorn, cardiac, chest, class, classroom, college, discussing, disease, education, exam, explaining, heart, heartbreak, heartburn, horn, ill, illness, infarct, infarction, lecture, lecturer, lesson, loudspeaker, man, megaphone, mentor, mentoring, palpitation, school, senior, sick, sickness, speaker, stroke, study, teacher, teaching, tired, training, tutor, tutoring, unhappy, university