A group of central Iowa show choirs will gather at Pella High School for an exchange performance Monday evening. Pella and Norwalk will first perform beginning at 6 p.m. before the auditorium is cleared and Des Moines Christian and Indianola take over. The four schools are making up weather-cancelled shows from the first week of the competition season. The Pella High School Show Choir Exchange is free admission, with entrance only allowed at the main entrance or by the Career Academy of Pella due to the Pella vs. Des Moines North Basketball games.