Almost every consequential decision about American public education is made by a formula that almost nobody reads. How much a district receives, whether a wealthy district can raise more, whether a poor district can raise anything, and which students generate additional funding are all set by state statutes that operate automatically and invisibly. This article explains why school funding depends on local property wealth in the first place. It covers why the federal courts closed the door to equal protection challenges and state courts opened a different one under their own education clauses. It walks through the standard formula step by step and identifies where its equalizing mechanisms fail. It explains what adequacy litigation asks, how it is proved, and how remedies are enforced against state officials. It closes with the desegregation remedies and federal programs that interact with the state formula.