The Staff Ratios and Adequate Supervision information, for NSW early childhood services, has been revised and updated by the NSW Regulatory Authority, NSW Department Of Education.

In a mixed age group of children, an educator who is caring for one age range of children can also be counted against another age range of children, as long as the ratio for each age range is maintained and adequate supervision is maintained at all times.

For centre-based services, some centres calculate ratios across the whole service, not by individual rooms. The term used is "under the roof".

Minimum educator-to-child ratios and purposeful for services to highlight the importance of the safety, welfare and wellbeing of children and for Educators to effectively supervise children within the environment.