I had my grandson here for the past week for his March break week, he's in JK and doesn't nap at school. I told him that he had to lay down just like he used to when he was in my daycare for naptime. He tossed and turned for the first hour and slept for the second hour pretty much every day but he knew that he had to be quiet for his friends. Teach the children respect for their friends and that you are firm on the naptime/quiet time rule and they will learn. It takes time and a lot of effort for a while but then once you get your point across to them you will be able to have your quiet time. I understand how important it is to have that peace in the middle of the day. We work such long days!