The Business Opportunity School has emerged from founder Nanno de Boer’s strong conviction that selling is a true trade. In addition, Nanno realized that in the training industry, the main focus is directed to training sales skills only, as such totally ignoring the importance of the total sales process. Good salesmanship requires tactics, technique and commercial innovation. But sales is also mainly part of a process during which several phases need te be completed. Phases which involve many different other employees. In this context, Nanno likes to use the metaphor of a tree.