Ключевые слова: boys, casual, chalk board, childhood, children, classmates, classroom, college, education, educational, female, gesture, gesturing, girls, homework, indoors, kids, knowledge, learn, lesson, male, people, rear view, school, schoolchildren, schooling, selective focuse, sign, students, study, studying, symbol, teach, teacher, teaching, teenage, teenagers, teens, together, togetherness, white board, young, youth,