Ключевые слова: 1618, 2634, activities, adolescence, adult, african, american, attentive, black, boy, caucasian, classes, college, control, credits, curious, desk, exam, female, girl, indoors, informative, inspection, interesting, lectures, lessons, male, man, monitoring, multiethnic, observation, process, professor, pupil, question, revise, school, student, tasks, teacher, teenage, testing, university, watching, white, writing, young, youths,