Ключевые слова: 1112 years, 1213 years, american, assistance, boy, brainstorm, caucasian, class, classmate, classroom, clever, cognition, community, company, concentration, education, european, exam, explaining, female, french, german, girl, group, guy, high school, indoor, kids, learning, lesson, male, mate, preteen, russian, school, schoolgirl, sitting, skill, smart, solution, solving, studying, test, young, youth,