Keywords
14-15 years, 16-17 years, 20's, 20-24 years, 20-25, 20-30, 20s, 25-29 years, 25-30, 40's, 40-45, 40-50, 40s, 45-50, 50-55, 50-60, 55-59 years, 55-60, accessory, adult, african, african american, african ethnicity, african-american, african-american ethnicity, afro american, afro-american, arm, arms raised, asian, asian ethnicity, black, boy, caucasian, chatting, chemistry, chemistry class, child, chinese ethnicity, close up, close-up, closeup, college, color, color image, colour, communicating, communication, concentrating, concentration, conversation, conversing, defending, dialog, dialogue, discussing, discussion, educating, education, educator, examining, eye-glasses, eyeglasses, eyeing, far eastern, fellow, female, fifties, fifty, forties, forty, gal, gentleman, girl, glasses, glove, goggles, group, guy, head & shoulders, head and shoulders, hearing, high angle, high angle view, high school, high-school, highschool, holding, horizontal, human, human being, indian, indian ethnicity, indoor, indoors, inside, instructing, japanese ethnicity, juvenile, kid, knowledge, lab, lab coat, laboratory, lady, learning, listener, listening, looking, looking up, male, man, mature adult, mature women, medium group of people, mid life, middle age, middle aged, middle-age, middle-aged, minor, multi-ethnic group, multicultural, multiculturalism, of african descent, oriental, people, person, petri dish, photography, professor, protection, protective eyewear, pupil, r&d, raised, raising, research, research & development, research and development, rubber glove, rubber-glove, safeguard, safety, school, science, scientific experiment, scrutinizing, seated, security, seeing, serious, seriousness, sitting, solemn, somber, speaking, specs, spectacles, standing, student, studying, talker, talking, teacher, teaching, teen, teenage, teenage boy, teenage boys, teenage girl, teenage girls, teenager, together, togetherness, twenties, twenty, university, viewing, western european, white coat, woman, women, young, young adult, young men, young women, youth, youthful, 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, bld119717