Ключевые слова: art, background, black, blackboard, blank, blue, board, chalk, chalkboard, child, classroom, closeup, color, colored, colorful, communication, concept, copyspace, design, draw, drawing, education, educational, empty, green, group, knowledge, learn, macro, message, multicolored, nobody, note, object, piece, pieces, pink, plank, red, school, teacher, teaching, tool, used, vintage, word, write, writing, yellow,