Ключевые слова: abstract, advertisement, advertising, backdrop, background, billboard, blank, board, chalk, chalkboard, class, classroom, closeup, college, concept, confusion, crayon, design, difficult, difficulty, dirty, disorder, draw, dysgraphia, dyslexia, dyslexic, education, element, elementary, empty, equipment, erase, exam, frame, green, grunge, highschool, intelligence, knowledge, language, learn, learning, leisure, lesson, letters, memory, mental, mind, need, nobody, object, old, pattern, problem, profile, read, reading, row, rubbed, school, science, sign, silhouette, skills, space, special, spelling, stress, student, study, surface, symbol, tangled, teacher, texture, think, understanding, view, wall, wallpaper, white, word, written, wrote,