When Mrs. MacGrady is diagnosed with cancer, Arthur and his friends all react differently to the news - Arthur and D.W. rush to her side with heaps of chicken soup and stuffed animals, Muffy tries to pretend that nothing in her life has changed, and Francine is so upset she can't even bring herself to visit Mrs. MacGrady.

D.W. meets 13-year-old Hana, who is much older and totally cool.

Buster is convinced teachers have it easy. Too bad he can't put himself in Mr. Ratburn's shoes to find out what it's really like to be a teacher… or can he?

George volunteers to create a piece of art for the county-wide art show and can't decide what to make.

When a kale smoothie spills all over Arthur's brand-new sneakers, he gets angry. Soon, everyone is scared of Arthur's temper!