Keywords
14-15 years, 18-19 years, 20s, 25-30 years, 30-35 years, 30s, adolescence, adult, asian, asian ethnicity, black hair, blouse, brown hair, casual clothing, chair, chinese, chinese ethnicity, chinese script, classroom, college student, color, color image, colour, communication, concentration, desk, education, expertise, female, front view, group of people, head and shoulders, holding, indoors, intelligence, learning, lecture, long hair, medium-length hair, mid adult, mid adult women, middle age, oriental, pants, pen, photography, professor, rear view, sitting, skill, standing, student, students, t-shirt, teen, teenage girls, teenager, text, three-quarter length, vertical, waist-up, whiteboard, women, young, young adult, young women, 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, u19314346