On Unorthodox Recruiting… This high school choir teacher maintains a high excitement level throughout the year, but it peaks with the beginning of school each fall. That’s when she’s on high alert to sign up new members. And she does it with the zeal of a gal awarded a 10-yard head start in a Sadie Hawkins Day race. Sandra Sanders Mattson, Killeen High School men’s choir director, is ever “at the ready” to add another voice, and if it happens to be bass, that’s all the bet ...