Ключевые слова: apple, back, background, black, blackboard, board, book, books, childhood, classroom, college, concept, desk, doodle, doodles, draw, drawing, education, graduate, graduation, group, homework, icon, idea, illustration, knowledge, learn, learning, lecture, letter, number, page, pencil, play, read, school, sketch, space, stack, student, symbol, table, tale, teaching, text, textbook, wisdom, write, writing, written,