Gabbi Ryan plans to back-flip her way round a Sport Relief mile on North Walsham High School's playing field today.
Former county gymnastics champion Gabbi, 15, will be joined by schoolfriends Beth Warnes, 15, and Jasmine Myhill, 16, who will cart-wheel the course.
The trio hope to raise at least �100 with their feat which they expect will take several hours.
Other pupils will be fund-raising throughout today with fancy-dress and competitive miles, soak-the-teacher, penalty shootout events and a hoop-a-thon.
A team from Sainsbury's in North Walsham is taking on Rossis Leisure in a two-day head-to-head rowing challenge, starting today.
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