The band is a musical organization for students of wind and percussion instruments. Klein offers multiple bands for students interested in instrumental music within the school day. Instruction begins in the sixth grade in homogeneous instrumental groupings and advances to full performance groups as student skills improve. In high school, the various concert bands meet daily after school to make up the marching band which performs at all varsity football games and selected contests. During concert season section rehearsals are scheduled after school one day a week to prepare for concerts and contests.