Ключевые слова: ability, abstract, academy, argue, background, blackboard, blur, blurred, bokeh, boy, business, center, child, class, classroom, college, color, colorful, concept, confer, defocus, discuss, diversity, education, friends, fun, grade, group, happy, homework, information, interior, kid, learn, lecturer, lesson, management, many, people, play, pupil, room, school, schoolchild, student, study, teacher, technology, young, youth,