One of President George W. Bush’s chief domestic accomplishments was passage of the No Child Left Behind Act, legislation designed to improve public education and student outcomes by requiring states to devise achievement goals measured through annual standardized testing, as well as yearly teacher and principal evaluations.Last year, Texas applied for a waiver under the law when education officials realized that Bush’s home state could not meet this year’s federal standards requiring that 90 percent of students in each district and school pass the reading and math tests.In fact, 95 percent of school districts in Texas would not have measured up, Education Commissioner Michael Williams said. That means the vast majority of the districts would have been labeled failures under the federal law.On Monday, the Education Department granted the waiver to relieve Texas of that burden, provided the state meets other accountability obligations including coming up with guidelines for teacher and principal evaluation and support systems. The state must have pilot programs for principal/teacher assessments in 40 districts in 2013-14, and it is required to submit final evaluation guidelines by May 2 to get its waivers extended through the 2014-15 school year.While educators and administrators hail the opportunity to be more flexible in measuring student and teacher achievement, they must come to grips with the fact that the federal law — until changed by Congress — still expects some kind of accountability. The delay tactic may be fine in the short-term, but it could prove problematic if, and when, waivers run out and the full extent of the law is back in effect.With 41 other states and the District of Columbia having been granted waivers from the federal educational requirements, Texans may feel that schools here are OK when compared with others around the country. They should not be comforted by that thought, and state education officials certainly should not use it as an excuse to become complacent.The state Legislature has already cut back the number of tests in public schools, meaning that measuring accountability has become even more challenging.Texas and the nation as a whole must determine whether No Child Left Behind is worth pursuing, and then decide how to make it work for everyone.