Wise donors know that charitable giving needs to be judged by its results and not just by good intentions. Yet for decades, philanthropic evaluations have tended to collect “body count” input measures such as number of meals served, blankets given away, or staff hours worked. With the advent of more results-oriented philanthropy, donors are increasingly looking into more meaningful measures of outcomes. This latest release in the Effective Donor series relays the practical advice of four experts on how donors can evaluate those outcomes in the programs they fund, with special emphasis on evaluating job training and school choice programs. Evaluation can also serve a foundation’s interests in unexpected ways, as when a program’s success causes it to be replicated by other donors.