Back view of mature professor giving lecture to large group of college students in the classroom.

• adult, back to school, caucasian, classroom, college, education, education building, education occupation, high school, indoors, knowledge, large group of people, learning, lecture, lecture hall, lifestyle, males, man, mature, people, professor, protective face mask, rear view, school building, senior, student, studying, talking, teacher, teaching, tutor, university, university student
• ID: 2112409937
• Model: 35944804 35944807 35944813 35944825 35944828 35944834 35944849 35944852 35944858 35944861 35944864 35944867 35944906 35944918
• 5472 x 3648 pixels