Ключевые слова: abstract, assignment, background, banner, blackboard, blank, blankness, board, book, border, casual, chalk, chalkboard, classroom, classwork, design, desk, education, family, flat, frame, glass, helping, home, homework, icon, label, lacunae, learning, operation, pattern, pencil, plank, production, read, rim, school, schoolroom, schoolwork, sitting, student, study, studying, symbol, tag, task, teaching, texture, work, write, young,