EDITOR'S NOTE: This is the second of three stories on recent school test results and the No Child Left Behind Act. Teachers and administrators are struggling with a paradox built into the state standards under the No Child Left Behind Act. Federal standards require that students with learning disabilities and English learners meet the same level of proficiency as their peers. And that has put a failing label on many otherwise adequate or improving schools. No Child Left Behind requires all students meet the same standards, which are set by states. The act divides test-takers into subgroups based on ethnicity,...