DAVID JOLES • djoles@startribune.com Mahtomedi, MN - Nov. 2, 2007 - Visiting teacher Amy Qu from China uses her hands to help students with sounds during the Chinese class Qu is teaching at O.H. Anderson Elementary School over the next seven weeks. As part of an exchange program the district is testing out to lay the groundwork for a permanent Chinese curriculum. Qu, an English teacher in China, is visiting the U.S. through an exchange program.