Ключевые слова: black, blackboard, boy, caucasian, chalkboard, cheerful, child, class, classroom, composite, digital, digital composite, earth, education, education knowledge, elementary, female, girl, globe, knowledge, learn, learning, lesson, male, map, mark, medium group of people, mixedrace, people, planet, pupil, question, question mark, school, smiling, student, study, studying, teacher, teaching, woman, young adult,