He dedicates his Sundays to teaching children Amharic, nurturing a love for their heritage and language. Additionally, he supports nurses in preparing for their board exams, ensuring they have the tools they need to succeed. As a prolific author, Dr. Tassew has penned over 30 books in multiple languages, including Amharic, Geez, Tigrigna, and Afaan Oromoo, showcasing his dedication to education and cultural preservation. His works also encompass teachings on the Ethiopian Orthodox Tewahido Church and modern medicine.