Ключевые слова: accessory, aid, back, background, black, blackboard, blured, board, chalk, child, class, classroom, concept, desk, educate, education, educational, equipment, exercise, geometrical, green, homework, horizontal, item, knowledge, learn, lesson, life, microscope, natural, new, nobody, office, real, scales, school, schooling, set, shapes, space, student, study, supplies, supply, table, teaching, text, visual, wisdom,