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Hooray for Diffendoofer Day!

Hooray for Diffendoofer Day! is a children's book credited to Dr. Seuss "with some help from Jack Prelutsky and Lane Smith". The book is based on verses and sketches created by Seuss before his death in 1991, and was expanded to book length and completed by writer Prelutsky and illustrator Smith for publication in 1998.

Hooray for Diffendoofer Day!
Hooray for Diffendoofer Day.jpg
AuthorDr. Seuss
Jack Prelutsky
IllustratorDr. Seuss
Lane Smith
CountryUnited States
GenreChildren's literature
PublisherRandom House
Publication date
January 1, 1998
Media typePrint (Hardcover and paperback)
811/.54 [E] 21
LC ClassPZ8.3.G276 Hm 1998
Preceded byMy Many Colored Days 
Followed byThe Bippolo Seed and Other Lost Stories 

The story surrounds a school that is well liked by its students notably because of its many eccentric teachers. However, the students must make a good grade on a standardized test (which turns out in the end to be a revising test on multiple subjects they regularly learn) lest they be sent to an adjacent school, which requires uniforms to be worn and is incredibly dull.