To draw on the lessons and good practices that have emerged from activities related to countering violent extremism and similar fields, the Government of Canada, as part of the Global Counterterrorism Forum (GCTF) Working Group on Countering Violent Extremism, hosted a two-day international symposium on measuring the effectiveness of CVE programming. Held 27–28 March 2013 in Ottawa and organized by Public Safety Canada and the Center on Global Counterterrorism Cooperation (CGCC), the symposium focused on evaluating CVE programming specifically and on sharing good practices to inform the design and further development of projects and programming undertaken by practitioners in government and civil society.