Anthem high schoolers take annual choir performance virtual Boulder Creek High School and last updated 2020-12-16 19:48:28-05 ANTHEM, AZ â The pandemic is forcing students and teachers to re-imagine the school year. Even more so when you are a high school choir. The Boulder Creek High School choir is making it work by taking their annual holiday celebration virtual. The students spent most of the semester perfecting their technique on Zoom, and only had two weeks of in-person rehearsals before recording. All those involved wore masks, practiced outside school hours, used a variety of locations on campus, and had several other safety measures in place.