For a while, the fight over how to improve public schools seemed to be quieting down. During the presidential campaign, Republican and Democratic education advisers happily finished each other’s sentences on such issues as expanding charter schools, recruiting better teachers and, in particular, rating schools by how much students improve.
Moving to the growth model for school assessment, by measuring each student’s progress, seems to be the favorite education reform of the incoming Obama administration. Up till now, we have measured schools by comparing the average student score one year with the average for the previous year’s students. It was like rating pumpkin farmers by comparing this year’s crop with last year’s rather than by how much growth they managed to coax out of each pumpkin.
The growth model appeals to parents because it focuses on each child. It gives researchers a clearer picture of what affects student achievement and what does not. Officials throughout the Washington area have joined the growth model (sometimes called “value-added”) fan club. The next step would be to use the same data to see which teachers add the most value to their students each year.