St. Paul's is on a 3-year cycle of Rotations.
Some churches do five or six year cycles.
St. Paul's cycle is a bit unusual in that it is exclusively Jesus-centered. Our minister also hopes to focus on certain themes in bible study groups and youth group activities when you can focus on older age groups and often have more than 30 to 40 minutes to get into more detail on these themes. After 3 years we can then go back to these stories with a different flavour. During the Rotation planning process churches keep a list of the stories, lessons, beliefs and practices NOT being covered by the Sunday School. Even six year plans can't teach every story they want.