What grades did Dr. Seuss have?

Theodor Seuss Geisel, better known by his pen name Dr. Seuss, did not have any formal grades in the sense you may be referring to. During his lifetime, he achieved significant recognition and success as an author, illustrator, and cartoonist. He is celebrated for his children's books, which are characterized by imaginative stories and distinct artwork. His works, such as "The Cat in the Hat," "Green Eggs and Ham," and "How the Grinch Stole Christmas!" have become timeless classics, widely enjoyed by generations of children and adults alike.