The document describes a conceptual curriculum model for designing original geographical curriculum materials. The model emanated from a series of research projects at the Geographical Institute's Department of Geography for Education at the Rijksuniversiteit of Utrecht, the Netherlands. The objective of the research was to gain insight into the developmental process used in human geography materials from 1974 through 1978. A diagram illustrating the model presents six developmental phases which are explained in the rest of the document. Phase I consists of formulating the overall objectives and roughly estimating the target group. It emphasizes the aim as global in relation to theme and educational perspectives, and points out that each phase also has its own aim within the context of the complete model. Phase II deals with studying secondary geographic sources. The objective is to order obtained knowledge and insights by studying the theme in breadth and depth. Phase III, development of the concepts structure, forms the hard core of the information processing model. Phase IV, designing an information structure, is divided into two subphases: designing a global information structure and designing a specific information structure. This includes delineating information content and sequence and formulating exercises and tasks. Phase V, realization, is the phase in which the project received its final form. Phase VI is evaluation. An explanation of three distinctive features of the model concludes the document. (CK)