Three Key Lessons and their Implications for Training by CDA Collaborative Learning Projects | Mar 1, 2008 | Guidance Three Key Lessons and their Implications for Training March 2008 | The Do No Harm Project download publication Suggested Citation: The Do No Harm Project. Three Key Lessons and their Implications for Training. Cambridge, MA: CDA Collaborative Learning Proejcts, 2008. Related Publications Do No Harm in Land Tenure and Property Rights: Designing and Implementing Conflict Sensitive Land Programs Do No Harm: How Aid Can Support Peace – Or War Options for Aid in Conflict: Lessons from Field Experience