A failure in student learning is a failure of the school. A failure to deal with that failure of the school is a failure of the law. The Legislature that wrote the charter law is responsible for making any changes needed in the law. Some state charter laws contain specific requirements for periodic evaluation. A pattern of annual changes and improvements is already visible in some states with strong laws.
Legislatures mostly react to proposals.
Individual legislators may propose some changes . . . But most proposals are likely to come from others. As a charter program grows the school-operators, through their association, will normally go back to the state with suggestions for change. It is necessary also for a school to succeed financially and in its relationships with its parents and its teachers. On both dimensions it will be important to give the school time to show results.