Ключевые слова: academic, adult, announcement, attention, blackboard, board, chinese, class, classroom, college, communication, community, computer, diverse, education, explain, female, girl, group, guidance, high, knowledge, learning, lesson, oral, people, presentation, project, reading, school, screen, serious, speak, student, talking, teacher, teaching, teen, teenager, tutor, university, white, woman, young, youth,