Ключевые слова: 20s, 2529 years, 67 years, 89 years, academic, african ethnicity, answering, assisting, attentive, bench, black, bottle, boy, boys, casual clothing, caucasian, caucasian ethnicity, chalkboard, child, childhood, classmate, classroom, concentration, desk, development, digital tablet, diverse, diversity, education, elementary, ethnically diverse, ethnicity, explaining, female, focused, girl, girls, green energy, guidance, hand raised, holding, indoors, information, innocence, intelligence, intelligent, knowledge, lifestyle, male, medium group of people, mixedrace, mixedrace person, multiethnic, notebook, pencil, school, school kid, schoolboy, schoolgirl, schoolmaster, schoolteacher, sitting, solar energy, standing, student, studying, teaching, tray, wisdom, woman, young adult, young women,