Many current music educators grew up in a time when being in an ensemble was solely about playing the music for the next concert. I personally cannot recall ever doing a worksheet or any real music theory work while in high school.
It seemed that all I had to do to get an “A” was come to my lessons, play at the concerts, and otherwise stay out of trouble. Outside practice was expected but not enforced. I did not realize until many years later that this method of teaching had set me up for years of mediocrity and frustration.