Arthur’s third grade class is shocked when they discover that Mr. Ratburn is getting married. When they overhear Mr. Ratburn talking about a wedding with a woman named Patty, the kids worry that he’s marrying someone even tougher than he is!

Muffy is determined to win the cookie competition at this year’s Strawberry Festival. Together with her friends, she makes the perfect batch of cookies with a brand new recipe. But she’ll have to decide which is more important: getting all the credit, or keeping her friends!