Michigan's new color-coded school accountability system is already up for an overhaul just two months after its debut.
Some lawmakers say schools should get A-F grades just like students do, so parents and others can easily understand performance.
A House committee is expected to begin hearings this week on new legislation to switch to letter grades for schools, which are used in roughly 15 states. The yet-to-be-introduced bills also could eliminate the state's separate top-to-bottom ranking while leaving intact designations that specify when the state can intervene in poor-performing schools.
Letter-graded schools seem intuitive on their face. The tricky part is determining how the rankings are calculated and making them credible.