the couple of times I have taken on a part time child I insisted on the child attending full time for at least the first 3-4 weeks to get them adjusted. if the parents weren't agreeable to this then they had to go else where. I no longer take part time and will only allow a current child to go to part time when the parent goes on mat leave. have one currently in that situation and then will have another one in jan as well but these children were full time so they know the rules and are already settled in. im not interested in the aggrevation of retraining a child every week.