In 2010, we reported on a poor town in Haiti, where school was held in a small, one-room church. Planet Money listeners were moved to donate some $3,000, which the principal of the school thought would be enough to build a school. A few months later, the money was gone, and all there was to show for it was a foundation, some concrete blocks and some rock and sand. We thought that would be the end of it. Then we heard from Tim Myers, a retired contractor from Colorado who decided to go to Haiti to build the school — and who realized, in 2011, that the project would cost more than $100,000. On today’s show: We return to Haiti, to see how the project is going. And we hear from Tim Myers, who says, if he had it to do over, he might do things differently.