The school has set up three interest courses in sports painting and calligraphy, with Mr. Yang, Mr. Zhang and Mr. Wang as the main bodies respectively.

From "Miss Li never attends classes in the playground", we know that Miss Li is not a PE teacher, but a music teacher or an art teacher. From "Teacher Zhang needs to use the piano in class", we know that Teacher Zhang is a music teacher. Therefore, Mr. Wang can only be an art teacher, while Mr. Wang can only be a PE teacher. Miss Li is an art teacher; Teacher Zhang is a music teacher.

Miss Wang is a PE teacher. Miss Li is an art teacher; Teacher Zhang is a music teacher.