One of the most interesting outcomes of all the recent research on entrepreneurship is that not all types of entrepreneurship are the same. Some entrepreneurship can actually be criminal in nature, and that is not the type of entrepreneurship that has positive social outcomes. Even within the world of legitimate entrepreneurship, there are so many lines to draw. We can distinguish between small business entrepreneurship, which is really about lifestyle businesses rather than growth businesses. If we focus on just the growth entrepreneurship, then there is both disruptive and sustaining entrepreneurship. For instance, a new firm can sell its technology, products and business models to incumbents, or it can use it to create a new enterprise that rivals the incumbents. It may be appropriate to narrow the types of entrepreneurship we teach to those that have the greatest prospect for both economic growth and the wealth of the entrepreneur. That type of entrepreneurship is high growth, usually technology based, entrepreneurship. Teaching this kind of entrepreneurship must naturally embrace risk taking because in these kinds of markets, there are many starters but few finishers. Small businesses have lower risk, but also lower returns.