Ключевые слова: american, background, beautiful, blackboard, blue, board, book, british, business, caucasian, chalkboard, class, classroom, communication, concept, culture, education, england, english, female, group, hand, happy, home, illustration, international, internet, knowledge, language, learn, learning, lesson, multiethnic, office, people, person, professional, school, student, study, table, teacher, team, text, training, wooden, word, work, writing, young,