Ключевые слова: activity, age, back, boys, caucasian, childhood, children, class, classroom, disabled, down, early, education, elementary, females, floor, friends, girls, group, guitar, handicapped, indoors, inside, instrument, integrated, kids, learning, lesson, males, mentally, mixed, music, musical, people, primary, pupil, race, school, schoolboy, schoolchild, schoolgirl, september, singing, sitting, small, student, syndrome, teacher, unconventional, warmingup,