Ключевые слова: 5, abc, alphabet, arithmetic, background, black, blackboard, board, bold, bw, chalk, chalkboard, chalky, childhood, closeup, color, count, design, digits, education, elementary, five, font, handwriting, handwritten, illustration, isolated, learn, manual, numbers, paper, pictured, primary, raster, school, sign, sketch, study, symbol, teach, textured, white, writing,