Ключевые слова: academic, adolescent, blackboard, board, campus, career, chalk, chalkboard, class, classroom, college, desk, education, expert, explaining, eyeglasses, female, group, hand, happy, highschool, holding, information, international, laptop, learning, lecture, lesson, listening, male, man, multiracial, online, people, person, point, presentation, professor, rear view, school, student, study, teach, teacher, teaching, teen, teenage, university, writing,