Here’s a simple principle: at the least, schools should be expected to help all students make a year’s worth of progress over the course of a year—even students that start school in September two or three grade levels above. And we should reserve our greatest praise (and perhaps rewards) for schools that accelerate the progress of all of their students and help each one reach his or her full potential. And that principle should apply to all of our children, regardless of the color of their skin, the size of their parents’ pocketbook, or their zip code. Anything else strikes me as unfair, unkind—and politically unsustainable.
Are public schools for all kids, or just some kids?
and, from the Heartland Institute:
Clowes: Is there any reason why students in schools with high concentrations of poverty should learn any less than students in an affluent district?
Sanders: Interestingly, I've caught the most political heat from some of the schools in affluent areas, where we've exposed what I call "slide and glide." One of the top-dollar districts in the state had always bragged about its test scores, but our measurements showed that their average second-grader was in the 72nd percentile. By the time those children were sixth-graders, they were in the 44th percentile. Under our value-added scheme, the district was profiled in the bottom 10 percent of districts in state. They were not happy. You'd think I had nuked the place.
With our value-added approach, we can demonstrate that our measure of school effectiveness is totally unrelated to traditional socioeconomic indicators. We have more than 1,300 elementary schools in this state; their effectiveness is totally unrelated to the racial composition of the school or the percentage of children in the federal free and reduced-price lunch program. That's looking at measures of progress, not at raw test scores.
You shouldn't hold teachers and principals of school districts accountable for things over which they have no control. You should hold them accountable for those things they do have control over. Schools and teachers don't have control over the achievement level when children walk in the door, but they do have control over how much that level is raised during the year.
If that is sustained over time, it becomes like compound interest, and what you see is populations of children constantly rising to higher and higher levels of achievement in later grades, regardless of where they started.
interview with William Sanders