Assessment and evaluation are essential educational practice. In December 2003, a set of Performance Indicators on the Domain of Child Development (revised edition) was published by the Education Manpower Bureau and Social Welfare Department to assist preschools in Hong Kong to evaluate young children’s performance in learning and development. This paper outlines how a project conducted by the Hong Kong Institute of Education has empowered 15 Hong Kong preschools using Performance Indicators to formulate strategies for self-evaluation on the Domain of Child Development. Implications for successful change of the assessment culture in the preschoosl are discussed.[Copyright © 2008 Hong Kong Institute of Educational Research. The journal website is located at http://www.fed.cuhk.edu.hk/en/pej/]