This paper deals with development planning in schools as the basic managerial activities, especially in a changing environment. It is stressed that collaborative organisational culture is one of the conditions for development planning to become a learning process. Many issues that are presented at the institution/school level can be also applied to the institutions at the national level. This paper is written on the basis of the management study which was part of my master study and the experiences I gained when I worked in national educational institutions during preparation and implementation of the new educational legislation in Slovenia. I also gained specific experiences and insights into the school system by providing different training programs for headteachers in the National Leadership School
