This article focuses on the change in selected state-level school finance variables from 1970 to 2000, with particular attention to the changes in these variables and school finance litigation decisions in states with and without state-level tax and expenditure limitations (TELs) or supermajority requirements (SMRs). The magnitude of the decrease in effort and the lower rate of increase in average perpupil expenditure (APPE) were statistically significant in states with SMRs. The greatest increases in APPE, average teacher salary, and percentage of funds from state sources were in the states with neither TELs nor SMRs; pupil-teacher ratios and adequacy scores also were more favorable in the latter group of states. Positive change in funding was less in states with constraints than in states without taxation or expenditure constraints. The least progress in funding was made in states with SMRs.