Ключевые слова: 17s, 55s, american, caucasian, class, classroom, communication, conversation, educating, elderly, english, european, explaining, female, friendly, german, girl, group, guy, helps, high school, knowledge, laptop, learning, lesson, library, male, mature, notebook, school, schoolboy, schoolchild, schoolgirl, studying, swede, teacher, teaching, teenagers, tutor, woman,