I haven't heard about it, but I just googled it a bit now. My current schedule is as follows: 8:45 snack (fruits) / 11:15 lunch / 12:00 to 2:30 nap (usually more for infants) / 3:00 large snack / 3:30 crafts, sensory activities, learning activities or just free play / around 4:30 free play. They are very busy in the morning I think because of that they eat well, and sleep well. I have not have big behavioral problems in a long time.