Keywords
adolescence, adult, boy, caucasian ethnicity, classroom, color image, contemporary, education, electronics, equipment, explain, explanation, female, five, five person, forties, girl, high school, horizontal, human, indoors, interior, laboratory, learn, learning, male, man, middle-aged, people, pixtal, pupil, student, teach, teacher, teaching, teenager, young, young adult, youth, 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, cd277038