Ключевые слова: blackboard, board, break, campus, caucasian, chalk, chalkboard, child, class, classmate, classroom, college, education, educational, female, girl, green, group, happy, indoors, kid, learning, lesson, lifestyle, man, people, person, pupil, room, school, schooling, schoolkid, schoolroom, student, study, studying, teacher, teen, teenager, thumb up, university, white, woman,