"U.S. students are being educated less well these days than they should be," writes W. James Popham. One key contributing factor is that educators often use the wrong tests to make their most important educational decisions. Two recent events have made it a perfect time to change the way we conduct our educational testing: growing…

For the last four decades, students' scores on standardized tests have increasingly been regarded as the most meaningful evidence for evaluating U.S. schools. Most Americans, indeed, believe students' standardized test performances are the only legitimate indicator of a school's instructional effectiveness. Yet, although test-based evaluations of…