How do I set up certain teams to not rotate through the stations?

By default, all teams will rotate through the all defined rotation settings. However, you may have certain groups, such as a nursery or preschoolers, who will not rotate with the rest. They can be marked to not rotate.

This is controlled on the "Teams" page in the "Settings" section. Click the edit icon to edit the group. On that page, you can set the rotation station where that starts. Change that to "Does not rotate."