This Power Point changes to show when each center is up. I have this one set to 15 minutes, but you can change it to fit your needs. I also have this one set for 4 rotations. It plays a chime when it is time to change stations.
This is totally editable - you will be able to change the names of the centers and add student names in the boxes.
The font I used is KG Drops of Jupiter - if you don't have this font installed on your computer, it will change the font when you open it.
This is a zipped file.
Please let me know if you have any questions.