尽管用于（比如）缩小班级规模的资金几乎没有作用，但投资于制度变革 — — 如引入监控和评估系统、集中管理的考试制度、教师激励等 — — 可以为每一美元投入带来3—5美元收益。
While money allocated to, say, reducing class sizes has very little impact, investment in institutional changes – such as the introduction of monitoring and evaluation systems, centrally administered examinations, and incentives for teachers – could result in $3-5 of good per dollar spent.