Are you referring to the balanced day in the school system? If so the children have two nutrition breaks (one in the am one in the pm). Each nutrition break should be followed by outdoor gross motor activity. You eliminate a "lunchtime" in the middle of the day. Something to keep in mind when developing a day schedule is making it follow the real world, ie easier for parents to keep their children consistent on weekends and for older children closer to a future schools lunch breaks.

I now work in kindergarten, many schools that had embraced balanced day( as it makes planning teachers duty / prep planninig time easier) have started to go back to the conventional way, and new schools are going with the conventional day scheduled more often.