School has begun

So today was the second day of school.  While my children's reactions have been mostly predictable, I don't understand a couple of things.

1-How is it that any rules we had last year (Rules that are printed out and on the fridge) seem to be forgotten.
2- Why do I need to say everything between 3-6 times to be heard now that school has begun.

That being said, all three kids have reacted to school as expected.

The most interesting (and annoying) is my eldest, in the throes of his teen years.  I suggested he go to school with a binder divided for each class.  Once he discovered what his teachers expected, we'd get all his supplies.

• One week before school- good idea.  
• Erev school- not so happy.  
• Night after first day- I am the most horrible parent for making him do this.  He knows what he wants, and I am 1000% (yes, 1000) wrong!  
• Second morning- next year everything has to go on the day of locker set-up.  He hates this system, and possibly me.
• Second night (after putting together only 3 binders divided into general studies, Jewish studies, and electives [his idea], and discovering that the dozen notebooks he wanted may not have been the best idea, plus he doesn't need folders)- "I see why this was the best way to do this."

Really?!