Keywords
40 to 49 years, 45 to 49 years, adult, adult education, attentive, blur, caucasian, class, classroom, coffee, college, contemplation, cup, day, differential focus, disposable, disposable cup, diversity, educate, educating, education, ethnic, facial expression, female, five people, focus, focus techniques, group, group of people, hand on chin, head and shoulders, headshot, hot drink, indoors, learning, lecture, listening, looking, looking away, male, man, mature adult, mature student, mature woman, mind, mix, mixed, mixed race, multi ethnic, multi-ethnic, multi-ethnic group, paying attention, preoccupied, public services, reflect, reflecting, reflective, school, senses, sitting, small group of people, smiling, social institution, sound, student, thought, 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, is099qs9s