Ключевые слова: accessory, back, background, blank, centimeter, class, college, compass, copy, design, different, education, element, empty, equipment, flat, geometry, kid, knowledge, lay, learning, length, lesson, math, measurement, measuring, millimeter, object, office, paper, pencil, plastic, pupil, ruler, school, sheet, space, stationery, student, study, studying, supply, table, text, tool, top, university, view, wooden, work,