See the Facilities page for ideas about space use. By rotating small groups of children through the activity centers, you allow space to be used for its best purpose and staff can work in those areas where they are most at ease.
Careful planning allows for classrooms to be used by multiple sections.
Bible story teachers may share the same lesson with multiple groups of students but since the groups are kept small, each child has a greater opportunity for individual attention. Some churches have decided it best to plan for movement between activities only for their school-age children. With their limited attention-spans a change of scenery often is just what they need for renewed interest. If you have one large age group, consider subdividing it and give each group a unique name. If you are blessed with multiple access routes, you may find it wise to designate to staff that certain hallways or stairs are off-limits to the older children.