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Author of the renowned course Fundamentals of Spelling and co-developer of the AI-powered learning program Grafari, Dr. Katharina Leemann has worked for decades with children, adolescents, and adults facing significant spelling challenges. Her course Fundamentals of Spelling — introduced 25 years ago — was a milestone in literacy education and is still widely used today. She has taught across German-speaking Switzerland and lectured at the Zurich University of Special Education. Although now retired, she continues to be active as an expert and author, contributing her expertise to the development of Grafari.