主语：state funds
谓语：are sometimes tied partly to
宾语：their success on metrics such as graduation rates and student retention

2、结果状语从句：so better grades can, by boosting figures like those, mean more money

主语：better grades
谓语：can mean
宾语：more money
插入语：by boosting figures like those

本句为复合句，主句意为“国家基金有时会与它们在毕业率和学生留校率等指标上的成功有一定关系”；结果状语从句由so引导，表明前面的前面这件事情所带来的结果。