Why naps make you smarter

Volunteers who took a 100-minute nap before taking a evening memorization test scored an average of 20% higher on the memory test compared with people who did the memorization without taking a nap first. You should sleep before you learn, and after helps a lot also. Taking a 90 minute nap helps lock in long term memory things, and dreaming does as well. I thought that this article was kind of cool because i really like to take naps when i can. I sometimes take naps after school and i get yelled at it for it, but i really shouldnt be cause im just trying to be smarter :)