I use one for each student who requires to be changed. This was especially helpful when it was time to request more changing supplies, such as diapers or wipes. Often times, parents were/are reluctant to send more supplies because it was expensive, cut into their home supply, they thought we were using the diapers on other children...you name it! I loved using this data sheet to make a copy and send home along with my request sheet for more supplies. It's hard to argue with data!