It has changed. Quite a bit actually. NOW, think about how much it has changed since 1980. My dad was a BD through the 80's. HS band was first period. ALL of the band. Nothing at the junior high until after lunch.
He and his assistant would teach first period then meet with the head coach, the cross-town band director and their head coach at the local taco place and have breakfast which turned into lunch. All 6 of them. After lunch, the BD's would go teach the 6-8 classes and the coaches would go back and do whatever it was that coaches did.
That was the gig back then. Both band programs were quite large and quite successful.
I was discussing grading policies with some band director friends (what else would we do on Corona-break?), and we got to talking about our high school experiences. We were all in high school in the late 90s, early 00s. Several very good high school band programs. None of us could remember any kind of regular tape tests (maybe 1-2 during all-region), chair tests more than 1-2 per year. No SmartMusic - was that even a thing that far back? We did pass-offs during marching season for our section leaders. Everybody got a 97 on their report card unless they skipped a performance - but nobody every skipped a performance.
By the time I went through music school and started teaching, my head director at the time had a comprehensive program of passoffs for marching and concert music. All-Region season included weekly checkpoints on the music (for top band at least). There was a pre-planned curriculum of scales and fundamentals that covered the 3 years of high school band. The biggest part of my job was pulling kids into a practice room one at a time to hear them play their assignments.
I've been through a couple of jobs since then, and every school where I've taught has a system of some sort. Passoffs, recording assignments, SmartMusic, something. Now that I'm the head director myself, I have my own system in place.
Has band directing changed that much in ~20 years?