Ключевые слова: background, background back to school, background with the teachers day, black, blackboard, board, book, celebrate, celebration, celebration of knowledge, chalk, chalk board, chalk drawings, chalkboard, chalkboard background, chalked, childhood, concept, congratulations to the teacher, copy space, decoration, design, drawing, education, element, figure, goodness, happy, heart, holiday, humanism, illustration, line, love, object, outline, postcard, school, sketch, symbol, texture, white,