Introduction -- Overview of the No Child Left Behind Act -- Methods -- Results -- What other kinds of information are needed? -- What problems do users encounter when interpreting test results? -- Discussion -- What can states and districts do to improve the utility of information for external audiences? -- What can researchers do to improve the utility of information for external audiences? -- What can journalists do to enhance the value of information on school performance? -- What can program officers do to enhance the value of information on school performance? -- Conclusions.