Ключевые слова: background, backgrounds, blackboard, blue, blueboard, blueish, chalk, class, classes, close up, color, colored, colors, colour, colours, concept, concepts, cyan, double, education, english, font, fonts, horizontal, language, languages, learn, learning, letter, letters, love, meaning, message, messages, pink, plan, school, sign, signal, signals, signs, study, symbol, symbolism, symbols, teach, teaching, text, two, white, word, words, written,