Keywords
adolescence, adult, blackboard, board, caucasian ethnicity, chalkboard, chalkboards, classroom, college, color image, contemporary, education, facial expression, female, focus, focused, girl, higher learning, horizontal, human, indoors, interior, learn, learning, mathematics, mood, note, one, one person, people, pixtal, serious, seriousness, sitting, student, study, table, teenager, university, waist-up, 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, cd267037