Ключевые слова: accessory, back, background, centimeter, class, college, compass, composition, copy, design, different, education, element, equipment, flat, geometry, grey, item, kid, knowledge, lay, learn, learning, length, lesson, light, many, math, measurement, measuring, millimeter, object, office, plastic, pupil, ruler, rulers, school, space, stationery, student, study, studying, supply, text, tool, top, university, view, work,