Blur classroom education background empty school class lecture room interior view, no teacher nor student

• abstract, academic, adult, appreciation, audience, blank, blur, business, chair, college, concept, conference, corporate, day, decoration, defocused, educational, equipment, event, exam, examination, group, hall, indoor, inside, international, knowledge, learning, lecture, lecturer, light, meeting, multimedia, national, nobody, people, perspective, presentation, professional, seminar, space, speaker, studying, table, teachers, teaching, training, university, week, world
• ID: 455702293
• 5908 x 3939 pixels