Keywords
30 to 34 years, 40 to 49 years, 45 to 49 years, adult, adult education, blur, book, caucasian, college, contemplation, day, differential focus, diversity, document, educate, educating, education, ethnic, eye contact, facial expression, female, focus, focus on foreground, focus techniques, head and shoulders, headshot, holding, indoors, learning, lecture, looking, looking at camera, male, man, mature adult, mature student, mature woman, mid adult, mid adult man, mind, mix, mixed, mixed race, multi ethnic, multi-ethnic, multi-ethnic group, portrait, preoccupied, public services, reading, reflect, reflecting, reflective, shallow focus, smiling, social institution, student, thought, two people, university, white, woman, stock image, images, royalty free photo, stock photos, stock photograph, stock photographs, picture, pictures, graphic, graphics, fine art prints, print, poster, posters, mural, wall murals, is099qt0t