International transfer, defined as the process of diffusing a product or idea across national boundaries, has become an increasingly significant source of educational innovation in recent years. In order to analyze the outcomes of an international transfer project, three dimensions should be considered. The first, the amount of change in the transferred product, might range from no changes to the addition of content, procedures or objectives. The second dimension is the amount of research and development effort generated in the transfer process. The third dimension is the effectiveness of the transfer effort and of its final product. The development of educational materials generally follows the product-market analysis model, in which all information about education/market variables is integrated and weighed in a number of stages. Systematic evaluation may make an important contribution to this process. The model is illustrated with a case study of the development of arithmetic games for primary schools. (BW)