Ключевые слова: 1617 years, 3034 years, 30s, 67 years, 89 years, abacus, academic, african ethnicity, arithmetic, bench, black, boy, boys, calculation, casual clothing, caucasian, caucasian ethnicity, child, childhood, classmate, classroom, communication, connection, count, desk, development, digital tablet, diverse, diversity, education, elementary, elementary school, ethnically diverse, ethnicity, explaining, female, girl, girls, global communication, holding, indoors, information, innocence, intelligence, intelligent, knowledge, lifestyle, male, man, mathematics, medium group of people, mid adult, mid adult men, mixedrace, mixedrace person, multiethnic, notebook, part of, pencil, school, school kid, schoolboy, schoolgirl, schoolmaster, schoolteacher, standing, student, teaching, teenage girls, teenager, wireless technology, wisdom,