Ключевые слова: back to school, background, backgrounds, billboard, black, blackboard, blank, board, chalk, chalkboard, class, classroom, colored, colored chalk, copy, copy space, copyspace, dirty, drawing, drawing board, education, element, empty, eraser, erasing, frame, horizontal, learning, lesson, message, nobody, school, space, sponge, students, teacher, teaching, texture, textured, wipe the slate, wood, write,