The 15-25 page packet for the month IS insane. It's human nature to procrastinate, studies have been done on this. You don't have to reduce the amount of homework, just give a week's at a time instead of a fucking month's. Hell I think bar book reports any assignment I had even at that age was due the next day or in two days. Just hand the homework out bits at a time, don't hand them a huge fucking month's worth all at once.
And even if the kid realistically has enough time to finish it on time they still don't have the where with all to look at that giant fucking packet and think of it like they just have to consistently do a little bit at a time for a long period. Just the sight will stress them out.