This study outlines the perceptions of school leaders regarding the New Senior Secondary Curriculum in Hong Kong. It illustrates the diversity of perceptions and responses of school leaders in terms of the purposes of the reforms, challenges to be faced, and strategies for implementing the reform. The findings suggest that school leaders' perceptions and responses are varied because of the different agendas and cultures of individual schools. This paper argues that planners need to avoid over-prescription in designing a new curriculum so as to allow schools scope to take account of their own characteristics and readiness when implementing the reforms. (Contains 2 figures and 2 tables.)