Students at Bonsack Elementary School beat out 12,000 schools around the nation, raising the most money for St. Jude Children's Research Hospital.
Their reward was a brand new $50,000 playground. The students took part in a math-a-thon. They do math problems and get sponsors.
The students even made websites using a St. Jude's site to reach people.
"You can email people or you can post links up to websites, and they can click on them and donate," said Abigail Angel, student.
"It goes to St. Jude to help the kids with cancer cause it takes millions of dollars for all of those prescriptions for the kids," said Elena Boitnett, student.
"I'm so excited about these kids and what they are doing, not the fact that we won so much, but just the fact that they feel so good about what they're doing, and that we're raising money for such a good cause," said Joy Watson, teacher.