Keywords
adolescence, african americans, blackboard, classroom, differential focus, education, face to face, female, four people, happiness, high school student, hispanic ethnicity, holding, image source, indoors, learning, lesson, male, man, mathematics, paperwork, rear view, schoolboy, schoolgirl, secondary school, smiling, student, sum, teacher, teaching, teenage boy, teenage girl, teenager, young adult, young man, 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, ie404-046, ie404 046, ie404046