Educational design encompasses many aspects of educational software development but needs to be extended to Project Design (PD) by inclusion of a strategy for dissemination. This crucial aspect of PD should be considered from the start and usually involves commercialization. Models for commercialization are diverse, and the choice can have implications for many aspects of the project and for its chances of success. This paper illustrates the case for PD by a brief account of StatPlay, a large multimedia project for learning of statistical concepts that was largely successful educationally but failed to achieve commercialization. The more modest PD of ESCI (Exploratory Software for Confidence Intervals) is also outlined. Taking commercialization seriously should lead to policy changes by universities and funding bodies and should include increased attention to intellectual property issues and the provision of professional support for aspects of commercialization. Formulating a comprehensive PD from the start and attending to commercialization issues throughout should yield more successful projects. (Contains 18 references.) (Author/MES)