Nour AlSaaideh and Heba Abu Deyak reflect on what they learned doing cost efficiency analysis with the Dioptra tool. When they look at Conditional Cash Transfers for Education, cost is one metric, but it's not the only--or maybe even the most important one. Learn more about how we can focus on effectiveness AND efficiency so that when we lower costs, we don't compromise on impacts. Focusing on just cost runs the risk of creating programs that reach a lot more people without providing useful impacts in their lives. Do it well, and with some structure, can you can learn a lot about improving your programs.