Keywords
13 to 15 years, 16 to 17 years, 35 to 39 years, accuracy, adolescent, adult, answer, blond, book, brunette, caucasian ethnicity, class, classroom, close, close-up, color, communicating, communication, companion, dark hair, day, demonstration, desk, detail, document, educate, educating, education, fair, female, flask, friendship, furnishing, group, group of people, guardian, hair, hair color, hairstyle, hands raised, head and shoulders, headshot, health-and-safety, intelligence, interaction, juvenile, lab coat, laboratory beakers, learning, lesson, long hair, medium group of people, mid adult, mid adult woman, networking, participation, physics, protection, protective clothing, puberty, pupil, question, ringlet, saying, school, science, seven people, showing, sitting, smart, stand, standing, stands, talking, teacher, teenage girl, teenager, textbook, view, view point, volumetric flask, volunteer, white, woman, youngster, youths, 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, is09a862e