Ключевые слова: advertisement, african ethnicity, black, blackboard, blank, blank space, boy, boys, casual clothing, chalkboard, child, class, classroom, copy space, day dreaming, development, education, educational, elementary school, empty space, green, greenboard, hand on chin, knowledge, looking up, male, one person, room, school, schoolchild, smiling, standing, student, thinking, thoughtful,