Ключевые слова: background, book, boy, brain, business, child, class, classroom, closeup, colorful, concept, confusion, design, desk, difficult, difficulty, disability, disabled, disorder, dyscalculia, dyslexia, dyslexic, education, handwritten, idea, illustration, kid, learn, learning, math, mathematics, message, note, notepad, notes, notice, office, paper, plan, problem, school, sign, sticky, sticky notes, stress, symbol, text, wood, wooden, workspace,