Ключевые слова: 20s, african american, black, boy, caucasian, classroom, college student, computer, computer keyboard, computer monitor, discussion, education, female, four people, friendship, girl, group, happy, high school student, horizontal, in a row, instructor, internet, it support, learning, library, listening, looking at camera, male, man, men, multiethnic group, people, person, portrait, school children, sitting, smiling, student, studying, talking, teacher, teaching, technology, teen, teenage, teenager, toothy smile, tutor, twenties, working, young men,