Ключевые слова: 12 years old, 13 years old, 14 years old, 15 years old, 20s, african american, black, boy, caucasian, class, college, connected, desk, digital tablet, education, female, focus on foreground, girl, group, helping, high school, hispanic, horizontal, learning, lesson, male, man, men, multicultural, multiethnic, people, person, pupil, school, sitting, stem, student, studying, table, tablet computer, teacher, teaching, technology, teen, teenage, teenager, tutor, twenties, usa,