Ключевые слова: abstract, art, artistic, artwork, back to school, background, book, branch, children, clipart, colorful, concept, conceptual, connect, connection, creative, design, draw, drawing, education, element, graphic, green, group, growth, icon, idea, illustration, isolated, knowledge, learn, learning, lesson, library, life, literature, lump, mental, mind, nature, note, object, paper, pencil, plant, read, reading, research, school, science, shape, sharp, sign, simple, sketch, study, symbol, symbols, teach, teaching, think, tree, trunk, university, white, wisdom,