Sticking to schedule

For the past 2 weeks, we have been starting school late (around 10:30) and the boys were having a hard time focusing.  So I decided to test out different schedules to see what times are most effective for their learning.  I wrote down the whole schedule on our big dry erase board, including homework, reading assignments, and breaks.  The last 2 days, I added an snack/exercise break in between lessons thinking it would help them to be refreshed (it worked for another mom).  However, it didn't work for my boys...they got even more rowdy afterwards.  So I switched the exercise time to be right after breakfast...it seems to work better so far.  Today I was finally able to stick to the schedule and was only 15 mins behind (discipline issues).  I timed their breakfast (20 mins) and lunch (30 mins) so they wouldn't be playing around pushing the schedule off.  This has helped tremendously and proved that they can do it if they don't play around.  So let's see how this will play out next week.