We've been following this for 2 years. For the first few weeks of school we start rehearsal at 6PM. (school is out at 4). Even then we have to start indoors some days. We do "quiet band hall" after school to encourage kids to get their homework done between school and band.

Summer band we start rehearsal at 7AM. As soon as August 1 hit we were learning dots. We had over half of the show on the field by the first day of school. Once school starts, lots of time in class doing reps with marking time and stepping out to ingrain muscle memory of the count structure.