Ключевые слова: alarm, back, background, basket, black, blackboard, blank, blue, board, chalk, chalkboard, classroom, clock, color, concept, desk, document, educate, education, elementary, erase, green, horizontal, indoor, inscription, items, knowledge, learn, lesson, letter, literature, message, nobody, primary, red, school, student, study, teach, teacher, text, textbook, time, training, vertical, wisdom, wood, write, writing,